Füssen's landmark, the Hohes Schloss (high castle), sits on a high rock and overlooks the village. Hohes Schloss is one of Bavaria's largest and best-preserved Gothic castle complexes, and is the former summer residence and fortress of the prince bishops of Augsburg.
The first castle on the hill dates back to the age of Roman Empire. The current castle was built in the 13-15th century. It was already integrated to city fortifications in 1363 and largely extended and renovated by bishop Friedrich II in the late 1400s and again around 1680 by Prince Bishop Johann Christoph von Freyberg.
The north wing of the palace contains the Staatsgalerie (State Gallery), with regional paintings and sculpture from the 15th and 16th centuries. The Städtische Gemäldegalerie (City Paintings Gallery) below is a showcase of 19th-century artists.
The inner courtyard is a masterpiece of illusionary architecture dating back to 1499.
References:The Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.