 Calder's work was responsible for an accident during its installation where two men were killed after the sculpture was dropped on them due to a crane collapse.Another highlight of the Putnam collection is Pablo Picasso's "Head of a Woman", which was designed by Picasso in 1962, though assembled by Carl Nesjar in 1971.The collection of European art covers nearly nine hundred years, from the twelfth century to the 20th.