In the 1960s, the governance of the Met was expanded to include, for the first time, a chairman of the board of trustees in contemplation of a large bequest from the estate of Robert Lehman. For six decades Lehman built upon an art collection begun by his father in 1911 and devoted a great deal of time the Met, before finally becoming the first chairman of the board at the Metropolitan in the 1960s. After his death in 1969, the Robert Lehman Foundation donated close to 3,000 works of art to the Metropolitan Museum of Art. Housed in the Robert Lehman Wing, which opened to the public in 1975 and largely financed by the Lehman Foundation, the museum has called it "one of the most extraordinary private art collections ever assembled in the United States".