Karlsruhe (dpa) - The designer Luigi Colani died at the age of 91 years in Karlsruhe. He had succumbed to a serious illness, said his partner. Colanis trademark was the round swing, the organic form. The universal designer designed cars and racing cars as well as furniture, dishes, glasses, cameras, televisions and clothing. "My world is round," he said before his 90th birthday last year in Karlsruhe, where he retired. He was considered very quarrelsome.