Old Castle built
950 CE.
Shown on the map at 48.777°, 9.180°.
The Old Palace (German: Altes Schloss) is a former castle located on the Schillerplatz in Stuttgart, Germany. The castle, originally a water castle dating back to the 10th century, was the residence of the Counts and later some Dukes of Württemberg and today is the home of the Landesmuseum Württemberg. The castle church (German: Schloßkirche) still functions as a place of worship.
Text from the Wikipedia article Old Castle (Stuttgart), licensed CC BY-SA 4.0.