Piet Mondrian, Composition with Red, Yellow, Black, Blue and Grey, 1921. Netherlands. Collection Gemeentemuseum Den Haag

Mondrian is often seen as a serene artist, a monk who turned his back on life and was solely dedicated to his art. He took his art seriously, but his lifestyle was different. The painter Mark Rothko described him as the most sensual artist he had ever met. He enjoyed going out with girlfriends, was a big Beethoven and Boogie Woogie enthusiast and loved to dance.