Italian painter. He is presumed to have been the son of the painter Buonaccorso di Pace (active c. 1348-c. 1362). His name first appears in the membership list of the Sienese painters' guild in 1355-56. In May and June 1372 and in March and April 1376 he participated in the government of Siena. He was Gonfaloniere for the Terzo di San Martino in 1381. Niccolò painted the capello, presumably the baldacchino, over the high altar of Siena Cathedral in 1376 and, in 1383, a panel of the prophet Daniel for an altar in the cathedral. There was once a signed and dated Virgin and Child Enthroned (1387; untraced) in Santa Margherita, Costalpino (Siena). Niccolò di Buonaccorso's only known signed work is a Marriage of the Virgin (National Gallery, London) inscribed NICHOLAUS BONACHURSI DE SENIS ME PINXIT, which was painted as a companion to a Coronation of the Virgin (Metropolitan Museum of Art, New York) and a Presentation of the Virgin (Galleria degli Uffizi, Florence). Other works by the artist include two panels of the Virgin and Child Enthroned with Saints (Museum of Fine Arts, Boston, and Staatliche Museen, Berlin). //