The Old Castle is located in the centre of Stuttgart. The first castle dated back to around 950 when Stuttgart was a settlement for breeding horses; it was built to guard the Stutengarten of the stud. In the 14th century it became the residence of the Counts of Württemberg and the court chamber (Hofkammer) of the House of Württemberg. In the 16th century dukes Christopher and Ludwig ordered it to be converted into a Renaissance palace or schloss; work which was carried out from 1553 to 1578. It was at this time (1560) that the equestrian staircase was built by Blasius Berwart. In 1562 the palace church was consecrated and the conference hall furnished. The moats around the castle were filled in during the 18th century.
In 1931, the castle was severely damaged by a fire and before it could be reconstructed it was damaged by bombing in the Second World War. The castle was finally renovated in 1969.
King Charles I of Württemberg and his wife Olga are buried beneath the castle church. The inner courtyard houses a monument to Eberhard I. The Old Castle stands adjacent to its replacement, the New Castle, which was built in the late 18th century.
Today the Old Castle is home to the Württemberg State Museum.
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.