The Old Castle (German: Altes Schloss) is located in the centre of Stuttgart, the capital of the German State of Baden-Württemberg. It dates back to the 10th century.
The first castle dated back to around 950 when Stuttgart was a settlement for breeding horses. In the 14th century it became the residence of the sovereign Counts of Württemberg. In the 16th century dukes Christopher and Ludwig ordered it to be converted into a Renaissance castle. Moats around the castle were removed in 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.
Today the Old Castle is home to the Württemberg State Museum.
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.
On the Karlsplatz side of the Old Castle is a museum dedicated to the memory of Claus Schenk Graf von Stauffenberg a former resident of Stuttgart who attempted to assassinate Adolf Hitler on 20 July 1944.