What is "baltia"

Baltia or Basilia is an island in northern Europe mentioned in Greco-Roman geography in the connection of amber.

It presumably corresponds to a territory near either the Baltic Sea or the North Sea, perhaps the coast of Prussia, the island of Gotland, Sweden. or of the Jutland Peninsula.

Baltia is a Palearctic genus of butterflies in the family Pieridae.The three species are found in the Himalayas.