The Isenburger Schloss is a Renaissance palace in the centre of Offenbach, built in the 16th century as the residence of the counts of Isenburg. It is the city's oldest surviving building and represents the pre-industrial history of what was once a small aristocratic residence town before leather factories changed its character entirely.
The building now houses the Hochschule für Gestaltung (College of Design) — Offenbach's art and design university, which has been one of Germany's leading design schools since the 1970s. The courtyard is open to the public and is pleasant to walk through. The combination of a Renaissance Schloss housing a contemporary design school is characteristic of Offenbach's layered identity.