sentences:  In 1959 in Florence, Mulas discovered Veruschka who later became a well-known model and artist.While covering the Spoleto Festival in 1962, Mulas befriended sculptor Alexander Calder, who later became a major subject of Mulas' photography and writings.While photographing the 1964 Venice Biennale, Mulas met several American artists, art critics, and the art dealer Leo Castelli.