Gozzoburg, Medieval castle in Krems an der Donau, Austria

Gozzoburg is a high-medieval town castle in Krems an der Donau, made up of an eastern and a western wing joined by the original building fabric. Its core is a late-Romanesque L-shaped structure built after 1235, with a raised entrance and three surviving round-arched windows. From the late 1240s the Krems town judge Gozzo von Krems enlarged it in three phases into a palace complex.

A late Romanesque L-shaped core building was erected after 1235. In the late 1240s the Krems town judge Gozzo von Krems took it over and expanded it in three phases into a palace complex. The name is first documented in 1258, and the newly built St Catherine's Chapel was consecrated in 1267. In 1320 the castle passed to the Habsburgs; it was damaged during the 1477 siege by Matthias Corvinus and rebuilt between 1484 and 1487.

The name Gozzoburg comes from Gozzo von Krems, the town judge who took over the house in the late 1240s and had it enlarged. The Barlaam and Josaphat legend painted on the walls was widely known across medieval Europe. Since 2007 the building has housed the Lower Austrian conservation department of the Federal Monuments Office.

The palace has been open to visitors through guided tours since 21 September 2007. Work on researching and restoring the Katharinenkapelle and the small chapel has continued since 2007, so parts of the chapel rooms may be closed. The building stands in the old town of Krems an der Donau and is reached on foot.

The Barlaam and Josaphat fresco uncovered during the 2007 restoration is among the oldest secular wall paintings in Central Europe. The medieval legend it depicts was known across Europe. Since 2009 the building has housed the Lower Austrian conservation department of the Federal Monuments Office.