The grandnephew of Wilhelm II, also named Wilhelm, moved into the Wilhelmpalais until Wilhelm II abdicated on 30 November 1918. On 9 November 1918, revolutionaries stormed the castle. The property passed into the ownership if the city of Stuttgart upon the abdication of Wilhelm II on 30 November 1918. It became a museum in 1929 that featured exhibitions. The building was destroyed during World War II.
