Madonna and Child with Saints John the Baptist, Jerome, Peter Martyr, and Bernardino and Four Angels. Artist: Sano di Pietro (Ansano di Pietro di Mencio) (Italian, Siena 1405-1481 Siena). Dimensions: Overall, with engaged (not original) frame, 28 1/8 x 22 1/8 in. (71.4 x 56.2 cm); painted surface 24 3/4 x 18 5/8 in. (62.9 x 47.3 cm). Date: ca. 1425-before ca. 1467.Sano di Pietro was a popular and highly prolific Sienese painter and illuminator, whose workshop produced numerous devotional images of the Madonna and Child, frequently shown in bust-length and accompanied by saints and angels. The close stylistic affinities between works attributed to Sano and the enigmatic Sienese artist known as the Osservanza Master may indicate that they represent a single artistic identity. It is also possible that the paintings attributed to the Osservanza Master are the product of a collaborative workshop to which these artists belonged. The Christ Child presses his cheek against the veil covering th