Village Werder, river Spree, Drobschsee and Schwenowsee in a Schmettau map from 1767/87 (map extract). Today, Werder is a part of the municipality Tauche in the District Oder-Spree, Brandenburg, Germany. The double designation „Dropschsee“ is incorrect; the western (left) lake is documented as Schwenowsee at the latest since 1514.