Lessing Julius Rosenwald was an American businessman, a collector of rare books and art, a chess patron, and a philanthropist.

Julius Rosenwald was an American businessman and philanthropist. He is best known as a part-owner and leader of Sears, Roebuck and Company, and for establishing the Rosenwald Fund, which donated millions in matching funds to promote vocational or technical education. In 1919 he was appointed to the Chicago Commission on Race Relations. He was also the principal founder and backer for the Museum of Science and Industry in Chicago, to which he gave more than $5 million and served as president from 1927 to 1932.