Burg Perchtoldsdorf, Castle in Perchtoldsdorf, Austria

Burg Perchtoldsdorf is a tower castle on the north side of Perchtoldsdorf's market square, at the edge of the Vienna Woods. Its surviving south tower, built as a bergfried, rises above a complex that includes the castle chapel, later elevated to a parish church, and a palace hall. The castle was repeatedly destroyed and rebuilt, and its present form reflects those reconstructions.

The castle's origins likely predate the year 1000, when it was built with other fortresses on the eastern edge of the Vienna Woods to protect the Babenberg lands from Hungarian invasions. It began as a brick tower with wooden buildings behind a palisade and moat. Heinricus de Pertoldesdorf is named as first lord in 1138; his successor replaced the wooden structures with masonry and added a walled outer bailey.

The castle now hosts theater performances, concerts, and exhibitions in its historic halls and courtyards where visitors gather throughout the year. It blends its medieval roots with contemporary cultural activities.

The castle complex stands on the north side of Perchtoldsdorf's market square, on the slope of the Vienna Woods. The courtyard has hosted the Sommerspiele Perchtoldsdorf theatre every year since 1976. After renovations, the castle reopened in June 2010 with a new underground event hall and foyer, while the old building fabric was left untouched.

The fortress withstood multiple military sieges over the centuries, including attacks from neighboring forces during the medieval period. The thick walls still visible today stand as evidence of these defensive struggles.