In the current debate over naming our art museum after a local donor, another museum gift should be recalled. Seventy-five years ago, on Dec. 22, 1936, Andrew W. Mellon, the Pittsburgh banker, statesman and art collector, wrote a letter to President Franklin D. Roosevelt. In his letter, which FDR received on Christmas Day, Mellon offered to build and endow a National Gallery of Art on the Mall in Washington, D.C., to which he would donate his entire art collection, consisting of many masterpieces from the Italian renaissance, plus iconic Flemish, Dutch, British and American paintings from the 15th century to the 19th century and 31 pieces of classical sculpture. The value of the whole gift is estimated at $80 million, or least $10 billion in today’s dollars. It may well be the largest gift ever made to a government from any single individual.