1855-1937. US financier who donated his art collection to found the National Gallery of Art, Washington DC in 1937. His son, Paul Mellon (1907-) was its president 1963-79. He funded Yale University's Center for British Art, New Haven, Connecticut, and donated major works of art to both collections. Born in Pittsburgh, Mellon attended Western University of Pennsylvania and entered the family banking firm. Through farsighted investments and loans to the expanding steel and oil industries of Pennsylvania, Mellon became one of the wealthiest men in America. He founded the Mellon National Bank 1902. He was appointed secretary of the treasury by President Harding 1921 and held the post until 1932, under presidents Coolidge and Hoover.