 Her collection at the palazzo remained open during the summers until her death in Camposampiero, northern Italy, in 1979; she had donated the palazzo and the 300-piece collection to the Solomon R. Guggenheim Foundation in 1976.The foundation, then under the direction of Peter Lawson-Johnston, took control of the palazzo and the collection in 1979 and re-opened the collection there in April 1980 as the Peggy Guggenheim Collection.After the Foundation took control of the building in 1979, it took steps to expand gallery space; by 1985, "all of the rooms on the main floor had been converted into galleries ... the white Istrian stone facade and the unique canal terrace had been restored" and a protruding arcade wing, called the barchessa, had been rebuilt by architect Giorgio Bellavitis.