Curator; professor of art history; novelist. Delen attended the Koninklijk Atheneum (high school) in Antwerp, where he befriended Alfons de Ridder (1882-1960), later known as the Flemish writer Willem Elsschot. Delen continued his education in economics at the Antwerp Hoger Handelsinstituut, and in art history at the Hoger Instituut voor Kunstgeschiedenis en Oudheidkunde in Brussels. He also attended the Royal Academy of Fine Arts in Antwerp. He was interested in the contemporary art scene and visited the studios of the painters Walter Vaes (1882-1958) and Richard Baseleer (1867-1951).