Langenstein Castle is a Renaissance building of the sixteenth century.
Today it is owned by the Douglases, descendants of the Swedish count Ludvig Douglas.
It is located within the territory of Orsingen-Nenzingen, a municipality in the Hegau region near lake Constance in southern Germany.
1943) sold the castle and all its lands to his cousin, Count Christoph Douglas (1948-2016).
1989), member of the Swedish-German branch of Clan Douglas and his family live in the castle today.