The Württemberg Mausoleum (sepulchral chapel) is a memorial in the Rotenberg part of Untertürkheim in Stuttgart, Germany. The mausoleum stands on the peak of Württemberg Hill at the westernmost end of Schurwald woods overlooking the Neckar river. The memorial was built for Catherine Pavlovna of Russia (1788–1819), the second wife of William I of Württemberg (1781–1864).