Kleve (klēv) [key], Cleve or Eng. Cleves, city (1994 pop. 44,780), North Rhine–Westphalia, W Germany, near the Dutch border. Tourism is important in the city, and its manufactures include foodstuffs, clothing, and chemical products. It is a rail junction and popular resort. Among its noteworthy buildings are the collegiate church (14th–15th cent.), which contains the tombs of the dukes of Kleve, and the 11th-century Schwanenburg [Ger., = swans' castle], which is associated with the legend of Lohengrin. Kleve was the capital of the former Duchy of Cleves.