Unidentified Artist Chinese, active 11th century, Portrait of Bi Shichang, from the set Five Old Men of Suiyang, 北宋 佚名 睢陽五老，畢世長像 冊頁, before 1056, Northern Song dynasty (960–1127). Album leaf; ink and color on silk. Image: 15 3/4 x 12 5/8 in. (40 x 32.1...