The strongest economic force in Northern Europe during the middle ages was the Hanseatic league, which used the Balticsea to establish trade routes between its member cities.
The Balticseacountries, which have access to the BalticSea are: Denmark, Sweden, Finland, Russia, Estonia, Latvia, Lithuania, Poland, and Germany.
The northern part of the BalticSea is known as the Gulf of Bothnia out of which the northernmost part is referred to as the Bay of Bothnia[?].
The BalticSea is unique: the largest body of brackish (low-salinity) body of water in the world, it is also distinguished by its division into a series of basins of varying depths, separated by shallow areas or sills.
Nine countries share the BalticSea coastline; Sweden and Finland to the north, Russia, Estonia, Latvia and Lithuania to the east, followed by Poland in the south, and Germany and Denmark in the west.
The largest of the ten rivers flowing to the Baltic are the Vistula (draining the territories of Belarus, Poland, Slovak Republic and Ukraine) and the Oder/Odra (draining the territories of the Czech Republic, Germany and Poland).