The Coronation of the Virgin, ca. 1380, Tempera on wood, gold ground, Overall, with engaged frame, 20 x 12 7/8 in. (50. 8 x 32. 7 cm) ; painted surface 17 5/8 x 10 1/2 in. (44. 8 x 26. 7 cm), Paintings, Niccolo di Buonaccorso (Italian, active Siena by 1372?died 1388 Siena), Niccolo di Buonaccorso was one of the most accomplished Sienese painters of the second half of the fourteenth century, though he is little known today. His surviving works are small in scale and rendered in a highly refined miniaturist technique