The tower that was a fortress, a school, and a prison

Château du Hohlandsbourg, a ruined castle in Alsace, has been many things. Built in the 13th century, it was first a fortress for the ruling family. In the 16th century, Lazarus von Schwendi, a general of the Holy Roman Empire, owned the castle and enlarged it, even bringing Tokay vines from Hungary to Alsace. The castle changed hands several times during wars, and was destroyed by French troops in 1637. It became a French monument historique in 1840 and was restored in the 1990s to become a cultural and historical center. After serving as a prison for a brief period, it now stands as a significant historical site.

Sources: Wikipedia, OpenStreetMap, Wikidata, Wikimedia Commons