Alt-Regensberg Castle
Switzerland · Europe
About
Alt-Regensberg Castle (Swiss German: Ruine Alt-Regensberg also referred to Altburg) is a hill castle which was built about the mid-11th century AD by the House of Regensberg in the Swiss municipality of Regensdorf in the Canton of Zürich.
Adapted from Wikipedia (CC BY-SA). Photography via Wikimedia Commons.