Stein, Leo (Daniel) (1872–1947)

US art collector and critic. His sister, Gertrude Stein, lived with him in Paris beginning in 1903, and they began collecting paintings by such contemporary artists as Cézanne, Matisse, and Picasso. His writings include Appreciation: Painting, Poetry, and Prose (1947). He is remembered as an influential promoter of 20th-century paintings.

He was born in Allegheny, Pennsylvania, the brother of Gertrude Stein. He studied at Harvard 1892–94, and Johns Hopkins in 1897, then moved to Paris in 1902. By 1912 he had returned to America to work as a journalist. He and his wife settled near Florence, Italy in 1921.