This tomb was built by Wilhelm I for his young wife Katharina who died at the age of 30 in 1819. Designed by Giovanni Salucci, it has also served as a Russian Orthodox chapel and is still in use on special occasions. This is a great destination when going for a walking through the picturesque vineyards of Untertürkheim. The view over the vineyards and Neckar valley to Stuttgart should not be missed.