 In recognition of that connection, and in honor of his first wife and two sons (who died at tragically young ages), Justin Thannhauser bequeathed the most essential and iconic works of his collection, including over 30 works by Picasso, to the Guggenheim Foundation in 1963.Beginning in 1965, the works were on loan to the museum and on view in the Thannhauser Wing.The collection formally entered the Guggenheim's permanent holdings in 1978, two years after Thannhauser's death, and the museum received a bequest of 10 additional works after the death of Hilde Thannhauser in 1991.