absalon arkona australia baltic sea bohemia cape arkona central europe czechs danish language denmark drevani eurasian avars finland finnic franks geats german language germanic peoples germany goths holstein holy roman empire hungarian slovenes huns ingaevones joan blaeu jomsborg kashubians king of the goths kingdom of prussia latvia limes saxoniae lower saxony lusatia lutheran church - missouri synod marches margrave mecklenburg milceni northern crusades northern march obotrites oder river ostsiedlung polabian slavs polabian language poland poles pomerania pomerania during the early middle ages ptolemy rugians saxo grammaticus saxons saxony scandinavia scandinavians slavic piracy slovaks slovenska bistrica sorbs svetovid sweden swedish language texas united states valdemar i of denmark veleti vends vistula veneti wendish crusade wendland west slavic languages west slavs white serbs world war ii