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83-725: The Slavic peoples between the Elbe and the Baltic coast had been conquered and nominally converted to Christianity in the campaigns of the German king Henry the Fowler and his son Otto I , who in 962 was crowned Holy Roman emperor. Otto had most recently defeated an alliance of Obotrite and Circipani tribes at the 955 Battle on the Raxa . The conquered area east of the German Duchy of Saxony

166-789: A daughter, Matilda, who married Lord Henry Borwin I of Mecklenburg . The Henry the Lion Bible is preserved in near-mint condition from the year 1170; it is located in the Herzog August Library in Wolfenbüttel , a town in Lower Saxony. Henry the Lion remains a popular figure to this day. During World War I , a nail man depicting Henry the Lion, called Eiserner Heinrich , was used in Brunswick to raise funds for

249-579: A fictional account of Henry's pilgrimage to the Holy Land . A popular part of the tale deals with the Brunswick Lion . According to legend, Henry witnessed a fight between a lion and a dragon while on pilgrimage. He joins the lion in its fight and they slay the dragon. The faithful lion then accompanies Henry on his return home. After its master's death, the lion refuses all food and dies of grief on Henry's grave. The people of Brunswick then erect

332-563: A limit to the Belt Sea. The shallow sills are obstacles to the flow of heavy salt water from the Kattegat into the basins around Bornholm and Gotland . The Kattegat and the southwestern Baltic Sea are well oxygenated and have a rich biology. The remainder of the Sea is brackish, poor in oxygen, and in species. Thus, statistically, the more of the entrance that is included in its definition,

415-634: A normal winter, except sheltered bays and shallow lagoons such as the Curonian Lagoon . The ice reaches its maximum extent in February or March; typical ice thickness in the northernmost areas in the Bothnian Bay , the northern basin of the Gulf of Bothnia, is about 70 cm (28 in) for landfast sea ice. The thickness decreases farther south. Freezing begins in the northern extremities of

498-647: A powerful state comprising Saxony, Bavaria and substantial territories in the north and east of Germany, Frederick had Henry tried in absentia for insubordination by a court of bishops and princes in 1180. Declaring that Imperial law overruled traditional German law, the court had Henry stripped of his lands and declared him an outlaw. Frederick then invaded Saxony with an Imperial army to bring Henry to his knees. Henry's allies deserted him, and he finally had to submit in November 1181 at an Imperial Diet in Erfurt . He

581-457: A related hypothesis holds that the name originated from this Indo-European root via a Baltic language such as Lithuanian. Another explanation is that, while derived from the aforementioned root, the name of the sea is related to names for various forms of water and related substances in several European languages, that might have been originally associated with colors found in swamps (compare Proto-Slavic *bolto "swamp"). Yet another explanation

664-504: A statue in the lion's honour. The legend of Henry the Lion also inspired the Czech tale of the knight Bruncvík , which is depicted on a column on Charles Bridge in Prague . The book The Pope's Rhinoceros (1996) by Lawrence Norfolk opens with an allegory of a planned ransack by Henry's army of the monastery at Usedom where purportedly a treasure was kept. However, the night before

747-588: A vassal of the Saxon Duke Henry the Lion . Baltic Sea The Baltic Sea is an arm of the Atlantic Ocean that is enclosed by Denmark , Estonia , Finland , Germany , Latvia , Lithuania , Poland , Russia , Sweden , and the North and Central European Plain . The sea stretches from 53°N to 66°N latitude and from 10°E to 30°E longitude. It is a shelf sea and marginal sea of

830-664: Is a reduction from the 25 incidents representing 1,110 kg (2,450 lb) of material in 2003. Until now, the U.S. Government refuses to disclose the exact coordinates of the wreck sites. Deteriorating bottles leak mustard gas and other substances, thus slowly poisoning a substantial part of the Baltic Sea. After 1945, the German population was expelled from all areas east of the Oder-Neisse line , making room for new Polish and Russian settlement. Poland gained most of

913-417: Is about 20,000 km (4,800 cu mi). The periphery amounts to about 8,000 km (5,000 mi) of coastline. The Baltic Sea is one of the largest brackish inland seas by area, and occupies a basin (a Zungenbecken ) formed by glacial erosion during the last few ice ages . The International Hydrographic Organization defines the limits of the Baltic Sea as follows: The northern part of

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996-413: Is adapted to reproducing also with no ice in the sea. The sea ice also harbors several species of algae that live in the bottom and inside unfrozen brine pockets in the ice. Due to the often fluctuating winter temperatures between above and below freezing, the saltwater ice of the Baltic Sea can be treacherous and hazardous to walk on, in particular in comparison to the more stable fresh water-ice sheets in

1079-819: Is possible that Pliny refers to an island named Basilia ("the royal") in On the Ocean by Pytheas. Baltia also might be derived from "belt", and therein mean "near belt of sea, strait". Others have suggested that the name of the island originates from the Proto-Indo-European root *bʰel meaning "white, fair", which may echo the naming of seas after colours relating to the cardinal points (as per Black Sea and Red Sea ). This '*bʰel' root and basic meaning were retained in Lithuanian (as baltas ), Latvian (as balts ) and Slavic (as bely ). On this basis,

1162-529: Is that the name originally meant "enclosed sea, bay" as opposed to open sea. In the Middle Ages the sea was known by a variety of names. The name Baltic Sea became dominant after 1600. Usage of Baltic and similar terms to denote the region east of the sea started only in the 19th century. The Baltic Sea was known in ancient Latin language sources as Mare Suebicum or even Mare Germanicum . Older native names in languages that used to be spoken on

1245-556: The All Saints' Flood of 1304 and other floods in the years 1320, 1449, 1625, 1694, 1784 and 1825. Little is known of their extent. From 1872, there exist regular and reliable records of water levels in the Baltic Sea. The highest was the flood of 1872 when the water was an average of 2.43 m (8 ft 0 in) above sea level at Warnemünde and a maximum of 2.83 m (9 ft 3 in) above sea level in Warnemünde. In

1328-587: The Alps . Later, he had Brunswick Cathedral built close to the statue. In 1147, Henry married Clementia of Zähringen , thereby gaining her hereditary territories in Swabia . He divorced her in 1162, apparently under pressure from Emperor Frederick Barbarossa, who did not cherish Guelphish possessions in his home area and offered Henry several fortresses in Saxony in exchange. In 1168, Henry married Matilda (1156–1189),

1411-694: The Apostle of the Slavs , died and his successor Gisilher had to struggle with the resistance by the Magdeburg chapter. He was backed by Emperor Otto II , who, however, was on campaign in Italy , where he suffered a disastrous defeat against the Sicilian Kalbids in the 982 Battle of Stilo and died the next year without having returned to Germany, leaving his minor son Otto III under the tutelage of

1494-486: The Bay of Kiel are parts of the Baltic Sea. Another usual border is the line between Falsterbo , Sweden, and Stevns Klint , Denmark, as this is the southern border of Øresund. It is also the border between the shallow southern Øresund (with a typical depth of 5–10 meters only) and notably deeper water. Drogden Sill (depth of 7 m (23 ft)) sets a limit to Øresund and Darss Sill (depth of 18 m (59 ft)), and

1577-780: The Black Sea and southern Russia. This Norse-dominated period is referred to as the Viking Age . Since the Viking Age , the Scandinavians have referred to the Baltic Sea as Austmarr ("Eastern Sea"). "Eastern Sea", appears in the Heimskringla and Eystra salt appears in Sörla þáttr . Saxo Grammaticus recorded in Gesta Danorum an older name, Gandvik , -vik being Old Norse for "bay", which implies that

1660-507: The Danish straits . According to the 18th-century natural historian William Derham , during the severe winters of 1703 and 1708, the ice cover reached as far as the Danish straits. Frequently, parts of the Gulf of Bothnia and the Gulf of Finland are frozen, in addition to coastal fringes in more southerly locations such as the Gulf of Riga. This description meant that the whole of the Baltic Sea

1743-718: The Netherlands , Denmark , and Scotland . The Polabian Slavs were gradually assimilated by the Germans. Denmark gradually gained control over most of the Baltic coast, until she lost much of her possessions after being defeated in the 1227 Battle of Bornhöved . In the 13th to 16th centuries, the strongest economic force in Northern Europe was the Hanseatic League , a federation of merchant cities around

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1826-531: The Netherlands : their fleets needed the Baltic timber, tar, flax, and hemp. During the Crimean War , a joint British and French fleet attacked the Russian fortresses in the Baltic; the case is also known as the Åland War . They bombarded Sveaborg , which guards Helsinki ; and Kronstadt , which guards Saint Petersburg; and they destroyed Bomarsund in Åland . After the unification of Germany in 1871,

1909-654: The Sambia Peninsula in Kaliningrad Oblast . The Bay of Pomerania lies north of the islands of Usedom/Uznam and Wolin , east of Rügen . Between Falster and the German coast lie the Bay of Mecklenburg and Bay of Lübeck . The westernmost part of the Baltic Sea is the Bay of Kiel . The three Danish straits , the Great Belt , the Little Belt and The Sound ( Öresund / Øresund ), connect

1992-657: The Stockholm area, southwestern Finland, and Estonia. The Western and Eastern Gotland basins form the major parts of the Central Baltic Sea or Baltic proper. The Bornholm Basin is the area east of Bornholm, and the shallower Arkona Basin extends from Bornholm to the Danish isles of Falster and Zealand . In the south, the Bay of Gdańsk lies east of the Hel Peninsula on the Polish coast and west of

2075-693: The Tanger River in the west. According to the contemporary chronicler Thietmar of Merseburg , the Obotrites joined the Lutici, devastated a St Lawrence monastery in Kalbe , the bishopric of Oldenburg and even assaulted Hamburg . A hastily assembled Saxon army was only able to retain the Slavs behind the Elbe. The Northern March and the Billung March were lost. The March of Lusatia as well as

2158-404: The 12th century. The bordering countries have also traditionally exported lumber, wood tar , flax , hemp and furs by ship across the Baltic. Sweden had from early medieval times exported iron and silver mined there, while Poland had and still has extensive salt mines. Thus, the Baltic Sea has long been crossed by much merchant shipping. The lands on the Baltic's eastern shore were among

2241-683: The Atlantic with limited water exchange between the two, making it an inland sea . The Baltic Sea drains through the Danish straits into the Kattegat by way of the Øresund , Great Belt and Little Belt . It includes the Gulf of Bothnia (divided into the Bothnian Bay and the Bothnian Sea ), the Gulf of Finland , the Gulf of Riga and the Bay of Gdańsk . The " Baltic Proper " is bordered on its northern edge, at latitude 60°N, by Åland and

2324-462: The Baltic Sea and the North Sea . In the sixteenth and early seventeenth centuries, Poland , Denmark , and Sweden fought wars for Dominium maris baltici ("Lordship over the Baltic Sea"). Eventually, it was Sweden that virtually encompassed the Baltic Sea . In Sweden, the sea was then referred to as Mare Nostrum Balticum ("Our Baltic Sea"). The goal of Swedish warfare during the 17th century

2407-677: The Baltic Sea is known as the Gulf of Bothnia , of which the northernmost part is the Bay of Bothnia or Bothnian Bay . The more rounded southern basin of the gulf is called Bothnian Sea and immediately to the south of it lies the Sea of Åland . The Gulf of Finland connects the Baltic Sea with Saint Petersburg . The Gulf of Riga lies between the Latvian capital city of Riga and the Estonian island of Saaremaa . The Northern Baltic Sea lies between

2490-645: The Baltic Sea was known as the Mare Suebicum or Mare Sarmaticum . Tacitus in his AD 98 Agricola and Germania described the Mare Suebicum, named for the Suebi tribe, during the spring months, as a brackish sea where the ice broke apart and chunks floated about. The Suebi eventually migrated southwest to temporarily reside in the Rhineland area of modern Germany, where their name survives in

2573-488: The Baltic Sea with the Kattegat and Skagerrak strait in the North Sea . The water temperature of the Baltic Sea varies significantly depending on exact location, season and depth. At the Bornholm Basin, which is located directly east of the island of the same name, the surface temperature typically falls to 0–5 °C (32–41 °F) during the peak of the winter and rises to 15–20 °C (59–68 °F) during

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2656-604: The Baltic and North Seas is the Langelandsbælt (the southern part of the Great Belt strait near Langeland ) and the Drogden -Sill strait. The Drogden Sill is situated north of Køge Bugt and connects Dragør in the south of Copenhagen to Malmö ; it is used by the Øresund Bridge , including the Drogden Tunnel . By this definition, the Danish straits is part of the entrance, but the Bay of Mecklenburg and

2739-567: The Baltic states and Poland. The remaining non-NATO and non-EU shore areas are Russian: the Saint Petersburg area and the Kaliningrad Oblast exclave . Winter storms begin arriving in the region during October. These have caused numerous shipwrecks , and contributed to the extreme difficulties of rescuing passengers of the ferry M/S Estonia en route from Tallinn , Estonia, to Stockholm , Sweden, in September 1994, which claimed

2822-469: The Baltic states. In 1945, the Baltic Sea became a mass grave for retreating soldiers and refugees on torpedoed troop transports . The sinking of the Wilhelm Gustloff remains the worst maritime disaster in history, killing (very roughly) 9,000 people. In 2005, a Russian group of scientists found over five thousand airplane wrecks, sunken warships, and other material, mainly from World War II, on

2905-575: The Bothnian Bay and the Bothnian Sea were frozen with solid ice near the Baltic coast and dense floating ice far from it. In 2008, almost no ice formed except for a short period in March. During winter, fast ice , which is attached to the shoreline, develops first, rendering ports unusable without the services of icebreakers . Level ice , ice sludge , pancake ice , and rafter ice form in

2988-658: The Empresses Theophanu and Adelaide . While there was internal dissention in the Holy Roman Empire, Slavic forces led by the Lutici revolted and drove out the political and religious representatives of the Empire. Starting from the Slavic sanctuary at Rethra , the bishops' seat of Havelberg on 29 June 983 was occupied and plundered, followed by Brandenburg three days later and numerous settlements up to

3071-451: The German war effort. Nazi propaganda later declared Henry an antecessor of the Nazi's Lebensraum policy and turned Brunswick Cathedral and Henry's tomb into a "National Place of Consecration". Shortly after his death, Henry the Lion became the subject of a folktale , the so-called Heinrichssage . The tale was later also turned into the opera Enrico Leone by Italian composer Agostino Steffani . The Heinrichssage details

3154-546: The Gulf of Bothnia normally thaw in late April, with some ice ridges persisting until May in the eastern extremities of the Gulf of Finland. In the northernmost reaches of the Bothnian Bay, ice usually stays until late May; by early June it is practically always gone. However, in the famine year of 1867 remnants of ice were observed as late as 17 July near Uddskär . Even as far south as Øresund , remnants of ice have been observed in May on several occasions; near Taarbaek on 15 May 1942 and near Copenhagen on 11 May 1771. Drift ice

3237-494: The Gulf of Bothnia typically in the middle of November, reaching the open waters of the Bothnian Bay in early January. The Bothnian Sea , the basin south of Kvarken , freezes on average in late February. The Gulf of Finland and the Gulf of Riga freeze typically in late January. In 2011, the Gulf of Finland was completely frozen on 15 February. The ice extent depends on whether the winter is mild, moderate, or severe. In severe winters ice can form around southern Sweden and even in

3320-409: The Gulf of Bothnia, on its northeastern edge by the Gulf of Finland, on its eastern edge by the Gulf of Riga, and in the west by the Swedish part of the southern Scandinavian Peninsula. The Baltic Sea is connected by artificial waterways to the White Sea via the White Sea–Baltic Canal and to the German Bight of the North Sea via the Kiel Canal . The Helsinki Convention on the Protection of

3403-429: The Lutici and waged war against Bolesław. This stabilized the independence of the Lutici and ensured that the area remained ruled by Polabian Slavs and unchristianized into the 12th century. The immediate consequences of the uprising were an almost complete stop on further German eastward expansion for the next 200 years. For most of the time, the dioceses of Brandenburg and Havelberg existed in titular form only, with

Slavic revolt of 983 - Misplaced Pages Continue

3486-408: The Marine Environment of the Baltic Sea Area includes the Baltic Sea and the Kattegat , without calling Kattegat a part of the Baltic Sea, "For the purposes of this Convention the 'Baltic Sea Area' shall be the Baltic Sea and the Entrance to the Baltic Sea, bounded by the parallel of the Skaw in the Skagerrak at 57°44.43'N." Historically, the Kingdom of Denmark collected Sound Dues from ships at

3569-426: The Vikings correctly regarded it as an inlet of the sea. Another form of the name, "Grandvik", attested in at least one English translation of Gesta Danorum , is likely to be a misspelling. In addition to fish the sea also provides amber , especially from its southern shores within today's borders of Poland , Russia and Lithuania . First mentions of amber deposits on the South Coast of the Baltic Sea date back to

3652-415: The adjacent marches of Zeitz , Merseburg and the Meissen in the south did not take part in the uprising. From 985, several princes of the Empire carried out annual campaigns together with the Christian Polish princes Mieszko I and Bolesław the Brave to subjugate the area, however these campaigns were unsuccessful. In 1003 King Henry II of Germany tried a different approach: he allied himself with

3735-431: The bishops residing at the royal court. Only in the 12th century after the Wendish Crusade of 1147 and the establishment of the Margraviate of Brandenburg under the Ascanian prince Albert the Bear in 1157, the settlements east of the Elbe were resumed; followed by the northern lands of Mecklenburg , where after several years of fighting against the Obotrite prince Niklot , his son Pribislav in 1167 declared himself

3818-408: The border between the ocean and the land-locked Baltic Sea, in tandem: in the Øresund at Kronborg castle near Helsingør ; in the Great Belt at Nyborg ; and in the Little Belt at its narrowest part then Fredericia , after that stronghold was built. The narrowest part of Little Belt is the "Middelfart Sund" near Middelfart . Geographers widely agree that the preferred physical border between

3901-423: The bottom of the Gotland Basin, at depths greater than 225 m (738 ft), the temperature typically is 4–7 °C (39–45 °F). Generally, offshore locations, lower latitudes and islands maintain maritime climates , but adjacent to the water continental climates are common, especially on the Gulf of Finland . In the northern tributaries the climates transition from moderate continental to subarctic on

3984-524: The bottom of the sea. Since the end of World War II , various nations, including the Soviet Union , the United Kingdom and the United States have disposed of chemical weapons in the Baltic Sea, raising concerns of environmental contamination. Today, fishermen occasionally find some of these materials: the most recent available report from the Helsinki Commission notes that four small scale catches of chemical munitions representing approximately 105 kg (231 lb) of material were reported in 2005. This

4067-416: The coast of the North and Baltic seas to the Alps , and from Westphalia to Pomerania . Henry achieved this great power in part by his political and military acumen and in part through the legacies of his four grandparents. Born in Ravensburg , in 1129 or 1131, he was the son of Henry the Proud , duke of Bavaria and Saxony, who was the heir of the Billungs , former dukes of Saxony . Henry's mother

4150-401: The collapse of the Communist regimes in Central and Eastern Europe in the late 1980s. Finland and Sweden joined NATO in 2023 and 2024, respectively, making the Baltic Sea almost entirely surrounded by the alliance's members, leading some commentators to label the sea a ″NATO lake″. Such an arrangement has also existed for the European Union (EU) since May 2004 following the accession of

4233-457: The daughter of King Henry II of England and Duchess Eleanor of Aquitaine , and sister of King Richard I of England . Henry faithfully supported Emperor Frederick in his attempts to solidify his hold on the Imperial Crown and his repeated wars with the cities of Lombardy and the popes, several times turning the tide of battle in Frederick's favor with his Saxon knights. During Frederick's first invasion of northern Italy, Henry took part, among

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4316-402: The east. He did not consider these Italian adventures worth the effort, unless Barbarossa presented Henry with the Saxon imperial city Goslar : a request Barbarossa refused. Barbarossa's expedition into Lombardy ultimately ended in failure. He bitterly resented Henry for failing to support him. Taking advantage of the hostility of other German princes to Henry, who had successfully established

4399-408: The eastern coast. Russia became and remained a dominating power in the Baltic. Russia's Peter the Great saw the strategic importance of the Baltic and decided to found his new capital, Saint Petersburg , at the mouth of the Neva river at the east end of the Gulf of Finland . There was much trading not just within the Baltic region but also with the North Sea region, especially eastern England and

4482-445: The healthier the Baltic appears; conversely, the more narrowly it is defined, the more endangered its biology appears. Tacitus called it the Suebic Sea, Latin: Mare Suebicum after the Germanic people of the Suebi , and Ptolemy Sarmatian Ocean after the Sarmatians , but the first to name it the Baltic Sea ( Medieval Latin : Mare Balticum ) was the eleventh-century German chronicler Adam of Bremen . The origin of

4565-413: The historic region known as Swabia . Jordanes called it the Germanic Sea in his work, the Getica . In the early Middle Ages , Norse (Scandinavian) merchants built a trade empire all around the Baltic. Later, the Norse fought for control of the Baltic against Wendish tribes dwelling on the southern shore. The Norse also used the rivers of Russia for trade routes, finding their way eventually to

4648-431: The ice further into the north, and much of the waters north of Gotland were again free of ice, which had then packed against the shores of southern Finland. The effects of the afore-mentioned high-pressure area did not reach the southern parts of the Baltic Sea, and thus the entire sea did not freeze over. However, floating ice was additionally observed near Świnoujście harbor in January 2010. In recent years before 2011,

4731-443: The interior lakes. The Baltic Sea flows out through the Danish straits ; however, the flow is complex. A surface layer of brackish water discharges 940 km (230 cu mi) per year into the North Sea . Due to the difference in salinity , by salinity permeation principle, a sub-surface layer of more saline water moving in the opposite direction brings in 475 km (114 cu mi) per year. It mixes very slowly with

4814-433: The last in Europe to be converted to Christianity . This finally happened during the Northern Crusades : Finland in the twelfth century by Swedes, and what are now Estonia and Latvia in the early thirteenth century by Danes and Germans ( Livonian Brothers of the Sword ). The Teutonic Order gained control over parts of the southern and eastern shore of the Baltic Sea, where they set up their monastic state . Lithuania

4897-423: The last very heavy floods the average water levels reached 1.88 m (6 ft 2 in) above sea level in 1904, 1.89 m (6 ft 2 in) in 1913, 1.73 m (5 ft 8 in) in January 1954, 1.68 m (5 ft 6 in) on 2–4 November 1995 and 1.65 m (5 ft 5 in) on 21 February 2002. An arm of the North Atlantic Ocean , the Baltic Sea is enclosed by Sweden and Denmark to

4980-429: The latter name is speculative and it was adopted into Slavic and Finnic languages spoken around the sea, very likely due to the role of Medieval Latin in cartography . It might be connected to the Germanic word belt , a name used for two of the Danish straits, the Belts , while others claim it to be directly derived from the source of the Germanic word, Latin balteus "belt". Adam of Bremen himself compared

5063-412: The lives of 852 people. Older, wood-based shipwrecks such as the Vasa tend to remain well-preserved, as the Baltic's cold and brackish water does not suit the shipworm . Storm surge floods are generally taken to occur when the water level is more than one metre above normal. In Warnemünde about 110 floods occurred from 1950 to 2000, an average of just over two per year. Historic flood events were

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5146-411: The more open regions. The gleaming expanse of ice is similar to the Arctic , with wind-driven pack ice and ridges up to 15 m (49 ft). Offshore of the landfast ice, the ice remains very dynamic all year, and it is relatively easily moved around by winds and therefore forms pack ice , made up of large piles and ridges pushed against the landfast ice and shores. In spring, the Gulf of Finland and

5229-429: The northernmost coastlines. On the long-term average, the Baltic Sea is ice-covered at the annual maximum for about 45% of its surface area. The ice-covered area during such a typical winter includes the Gulf of Bothnia , the Gulf of Finland , the Gulf of Riga , the archipelago west of Estonia, the Stockholm archipelago , and the Archipelago Sea southwest of Finland. The remainder of the Baltic does not freeze during

5312-414: The others, in the victorious sieges of Crema and Milan. In 1172, Henry took a pilgrimage to Jerusalem (June–July), meeting with the Knights Templar and Knights Hospitaller , and spending Easter of that year in Constantinople. By December 1172, he was back in Bavaria and, in 1174, he refused to aid Frederick in a renewed invasion of Lombardy because he was preoccupied with securing his own borders in

5395-408: The peak of the summer, with an annual average of around 9–10 °C (48–50 °F). A similar pattern can be seen in the Gotland Basin , which is located between the island of Gotland and Latvia. In the deep of these basins the temperature variations are smaller. At the bottom of the Bornholm Basin, deeper than 80 m (260 ft), the temperature typically is 1–10 °C (34–50 °F), and at

5478-759: The rich city of Bardowick as punishment for its disloyalty. Only the churches were left standing. Barbarossa's son, Emperor Henry VI , again defeated Duke Henry, but in 1194, with his end approaching, he made his peace with the Emperor, and returned to his much diminished lands around Brunswick, where he peacefully sponsored arts and architecture. By his first wife, Clementia of Zähringen (divorced 1162), daughter of Duke Conrad I of Zähringen and Clemence of Namur, Henry had: By his second wife, Matilda (married 1168), daughter of King Henry II of England and Duchess Eleanor of Aquitaine : Three other children are listed, by some sources, as having belonged to Henry and Matilda: By his lover, Ida von Blieskastel, he had

5561-446: The sea with a belt, stating that it is so named because it stretches through the land as a belt ( Balticus, eo quod in modum baltei longo tractu per Scithicas regiones tendatur usque in Greciam ). He might also have been influenced by the name of a legendary island mentioned in the Natural History of Pliny the Elder . Pliny mentions an island named Baltia (or Balcia ) with reference to accounts of Pytheas and Xenophon . It

5644-413: The shores of the sea or near it usually indicate the geographical location of the sea (in Germanic languages), or its size in relation to smaller gulfs (in Old Latvian), or tribes associated with it (in Old Russian the sea was known as the Varanghian Sea). In modern languages, it is known by the equivalents of "East Sea", "West Sea", or "Baltic Sea" in different languages: At the time of the Roman Empire ,

5727-500: The southern shore . The Soviet Union gained another access to the Baltic with the Kaliningrad Oblast , that had been part of German-settled East Prussia . The Baltic states on the eastern shore were annexed by the Soviet Union. The Baltic then separated opposing military blocs: NATO and the Warsaw Pact . Neutral Sweden developed incident weapons to defend its territorial waters after the Swedish submarine incidents . This border status restricted trade and travel. It ended only after

5810-497: The upper waters, resulting in a salinity gradient from top to bottom, with most of the saltwater remaining below 40 to 70 m (130 to 230 ft) deep. The general circulation is anti-clockwise: northwards along its eastern boundary, and south along with the western one . Henry the Lion Henry the Lion ( German : Heinrich der Löwe ; 1129/1131 – 6 August 1195 ), also known as Henry III, Duke of Saxony (ruled 1142-1180) and Henry XII, Duke of Bavaria (ruled 1156-1180),

5893-402: The west, Finland to the northeast, and the Baltic countries to the southeast. It is about 1,600 km (990 mi) long, an average of 193 km (120 mi) wide, and an average of 55 metres (180 ft) deep. The maximum depth is 459 m (1,506 ft) which is on the Swedish side of the center. The surface area is about 349,644 km (134,998 sq mi) and the volume

5976-716: The whole southern coast became German. World War I was partly fought in the Baltic Sea. After 1920 Poland was granted access to the Baltic Sea at the expense of Germany by the Polish Corridor and enlarged the port of Gdynia in rivalry with the port of the Free City of Danzig . After the Nazis' rise to power, Germany reclaimed the Memelland and after the outbreak of the Eastern Front (World War II) occupied

6059-629: Was Gertrude , only daughter of Emperor Lothair II and Empress Richenza , heiress of the Saxon territories of Northeim and the properties of the Brunones , counts of Brunswick . Henry's father died in 1139, aged 32, when Henry was still a child. King Conrad III had dispossessed Henry the Proud of his duchies in 1138 and 1139, handing Saxony to Albert the Bear and Bavaria to Leopold of Austria . This

6142-568: Was the last European state to convert to Christianity . In the period between the 8th and 14th centuries, there was much piracy in the Baltic from the coasts of Pomerania and Prussia , and the Victual Brothers held Gotland . Starting in the 11th century, the southern and eastern shores of the Baltic were settled by migrants mainly from Germany , a movement called the Ostsiedlung ("east settling"). Other settlers were from

6225-462: Was a member of the Welf dynasty . Henry was one of the most powerful German princes of his time, until the rival Hohenstaufen dynasty succeeded in isolating him and eventually deprived him of his duchies of Bavaria and Saxony during the reign of Emperor Frederick Barbarossa and of Frederick's son and successor Henry VI . At the height of his reign, Henry ruled over a vast territory stretching from

6308-414: Was also observed on 11 May 1799. The ice cover is the main habitat for two large mammals, the grey seal ( Halichoerus grypus ) and the Baltic ringed seal ( Pusa hispida botnica ), both of which feed underneath the ice and breed on its surface. Of these two seals, only the Baltic ringed seal suffers when there is not adequate ice in the Baltic Sea, as it feeds its young only while on ice. The grey seal

6391-569: Was because Henry the Proud had been his rival for the Crown in 1138. Henry the Lion did not relinquish his claims to his inheritance, and Conrad returned Saxony to him in 1142. A participant in the 1147 Wendish Crusade , Henry also reacquired Bavaria by a decision of the new emperor, Frederick Barbarossa , in 1156. However, the East Mark was not returned and became the Duchy of Austria . Henry

6474-467: Was covered with ice. Since 1720, the Baltic Sea has frozen over entirely 20 times, most recently in early 1987, which was the most severe winter in Scandinavia since 1720. The ice then covered 400,000 km (150,000 sq mi). During the winter of 2010–11, which was quite severe compared to those of the last decades, the maximum ice cover was 315,000 km (122,000 sq mi), which

6557-670: Was exiled from Germany in 1182 for three years, and stayed with his father-in-law in Normandy before being allowed back into Germany in 1185. At Whitsun 1184, he visited the Diet of Pentecost in Mainz, probably as a mediator for his father-in-law Henry II. He was exiled again in 1188. His wife Matilda died in 1189. When Frederick Barbarossa went on the Crusade of 1189 , Henry returned to Saxony, mobilized an army of his faithful, and conquered

6640-514: Was initially organized within the vast Saxon Eastern March under Margrave Gero , but divided into smaller marches upon his death in 965. In order to stabilize his rule, Otto promoted the conversion of the Slavic population, establishing the bishoprics of Havelberg and Brandenburg in 948, followed by the Archbishopric of Magdeburg in 968, which in particular carried out active missionary work. In 981 Archbishop Adalbert of Magdeburg ,

6723-470: Was reached on 25 February 2011. The ice then extended from the north down to the northern tip of Gotland , with small ice-free areas on either side, and the east coast of the Baltic Sea was covered by an ice sheet about 25 to 100 km (16 to 62 mi) wide all the way to Gdańsk . This was brought about by a stagnant high-pressure area that lingered over central and northern Scandinavia from around 10 to 24 February. After this, strong southern winds pushed

6806-491: Was the founder of Munich (1157) and Lübeck (1159); he also founded and developed numerous other cities in Northern Germany and Bavaria, a.o. Augsburg , Hildesheim , Stade , Kassel , Güstrow , Lüneburg , Salzwedel , Schwerin and Brunswick . In Brunswick, his capital, he had a bronze lion , his heraldic animal, erected in the courtyard of his castle Dankwarderode in 1166—the first bronze statue north of

6889-630: Was to make the Baltic Sea an all-Swedish sea ( Ett Svenskt innanhav ), something that was accomplished except the part between Riga in Latvia and Stettin in Pomerania. However, the Dutch dominated the Baltic trade in the seventeenth century. In the eighteenth century, Russia and Prussia became the leading powers over the sea. Sweden's defeat in the Great Northern War brought Russia to

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