The Baltic Sea is in northeastern Europe, surrounded by the Scandinavian Peninsula, the mainland of east and central Europe, and the Danish isles. It drains into Kattegat and the North Sea through Öresund and the Great and Little Belt of Denmark.
At the time of the Romans, 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  when the ice on the Baltic Sea breaks apart and chunks float about.
The strongest economic force in Northern Europe during the middle ages was the Hanseatic league, which used the Baltic sea to establish trade routes between its member cities. During the 17th century, when the Swedish empire virtually encompassed the Baltic sea it was sometimes referred to as Mare Nostrum Balticum. 
The Baltic Sea starts to get very rough with the October storms. These winter storms have been the cause of many ship wrecks. In 1945 the Baltic Sea became a mass grave to drowned people on torpedoed refugee ships. But thanks to the cold brackish water, the sea is a time capsule for centuries old shipwrecks.
The 
Baltic sea countries, which have access to the Baltic Sea are: 
Denmark, 
Sweden, 
Finland, 
Russia, 
Estonia, 
Latvia, 
Lithuania, 
Poland, and 
Germany.
The northern part of the Baltic Sea is known as the 
Gulf of Bothnia out of which the northernmost part is referred to as the 
Bay of Bothnia[?]. Immediately to the south of it lies the 
Sea of Åland[?]. The 
Gulf of Finland connects the Baltic sea with St. Petersburg. The Northern Baltic lies between the Stockholm area, southwestern Finland, and Estonia. The Western and Eastern Gotland Basins form the major parts of the central Baltic Sea. The 
Gulf of Riga[?] lies between Riga and Saaremaa and Gdansk Basin lies east of the Hel peninsula on the Polish coast. Bornholm Basin is the area east of Bornholm and Arkona Basin extends from Bornholm to the Danish isles of Falster and Zealand. The westernmost part of the Baltic Sea is 
Kiel Bight[?]. The Sound, the Belts, and the 
Kattegat connect the Baltic Sea with the 
Skagerrak and the North Sea.
The Baltic Sea contains the large islands
Bodies of water that drain into the Baltic Sea include (clockwise from 
Öresund):
- Sweden
- Svartån[?] (at Svarte[?] near Ystad),
- Tommarpaån[?] (at Simrishamn),
- Helgeån (at Nyehusen[?] near Kristianstad),
- Hemån[?] (at Karlskrona),
- Ljungbyån[?] (at Ljungby near Kalmar),
- Göta kanal (at Mem[?] near Söderköping),
- Motala ström (at Norrköping),
- Stockholm ström (at Stockholm),
- Dalälven[?] (at Gävle),
- Indalsälven[?] (at Sundsvall),
- Ångermanälven[?] (at Härnösand[?]),
- Ume älv[?] (at Umeå),
- Skellefte älv[?] (at Skellefteå),
- Lule älv[?] (at Luleå),
- Kalix älv[?] (at Kalix),
- Torne älv[?] (at Haparanda/Torneå[?]),
 
- Finland
- Russia
- Estonia
- Latvia
- Lithuania
- Russia (Enclave of Kaliningrad)
- Poland
- Germany
See also: Council of the Baltic Sea States, Baltic sea countries, Baltic states, Northern Europe
Old shipwrecks (
http://www.abc.se/~pa/uwa/wrecks.htm) in the Baltic
 
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