adam of bremen amber ancylus lake archipelago sea arctic atlantic ocean baltia baltic-finnic languages baltic languages baltic region baltic states baltica baltiysk bay of kiel bay of mecklenburg bay of pomerania belarus benthos black sea bomarsund bornholm bothnian bay bothnian sea brackish water bulgarian language calque christianity christianization of lithuania copenhagen council of the baltic sea states crimean war croatian language curonian lagoon czech republic danish language danish straits denmark drainage basin dutch language early middle ages england english language espoo estonia estonian language europe european union falster fast ice fathom ferry finland finnish language fish flax former eastern territories of germany france free city of danzig french language fur gandvik gdynia geographic coordinate system geology german exodus from eastern europe german language germanic languages germans germany gesta danorum gotland gotland basin great belt great northern war gulf of bothnia gulf of finland gulf of riga hailuoto hanko hartmann schedel heimskringla helsinki hemp herring hiiumaa history of greece hungarian language icebreaker icelandic language iron isostasy italian language jordanes kaliningrad kaliningrad oblast karlskrona kashubian language kattegat kibibyte kiel kiel canal kockums korpo kotka kustavi kvarken latin latitude latvia latvian language list of countries list of islands in the baltic sea list of rivers of the baltic sea lithuania lithuanian language little belt littorina littorina sea livonian brothers of the sword longitude lumber maardu mariehamn mastogloia sea material mediterranean basin metropolitan area mile mining monastic state of the teutonic knights monoporeia affinis muhu nagu neman river netherlands nord stream north sea northern crusades northern europe norway norwegian language novgorod republic oder-neisse line old english old norse operation hannibal oresund bridge ostsiedlung oulu oxygen palanga pancake ice pargas peter i of russia phytoplankton pleistocene pliny the elder poland poles polferries polish corridor polish language pori portable document format ports of the baltic sea portuguese language post-glacial rebound proto-indo-european language prussia pytheas riga river roman empire romance languages romanian language rostock russia russians saaremaa saint petersburg salinity salt sambia saxo grammaticus scandinavia scandinavian peninsula scots sea shipworm significant wave height silja line silver skagen skagerrak slavic languages slovakia soviet union spanish language stockholm stockholm archipelago suebi superfast ferries swabia sweden swedish empire swedish language szczecin tacitus tallink tallinn tar teutonic knights the belts tricity turku ukraine united kingdom university of helsinki usedom ventspils viking age viking line wends white sea wiktionary wolin world war i world war ii xenophon yoldia sea zealand