Fodor's Expert Review Altes Schloss
This former residence of the counts and dukes of Württemberg was originally built as a moated castle around 1320. Wings were added in the mid-15th century, creating a Renaissance palace. The palace now houses the Landesmuseum Württemberg (Württemberg State Museum), with exhibits tracing the area's development from the Stone Age to modern times and a floor of jaw-dropping family jewels of the fabulously rich and powerful Württemberg royals. There's also a separate floor dedicated to a children's museum.