Sülz is a municipal part of Cologne, Germany and part of the district of Lindenthal. Sülz lies on Luxemburger Straße between Lindenthal and Klettenberg. Sülz has 35.475 inhabitants and covers an area of 5,17 km2. The name Sülz goes back to Sulpece, first mentioned in 1145 as a possession of the Church of St. Pantaleon. The 12th century Weißhaus is a water castle and the oldest building in Sülz.