The Madonna of Humility. Dated: c. 1430. Dimensions: painted surface: 60.7 x 45.2 cm (23 7/8 x 17 13/16 in.) support: 62.8 x 47.2 cm (24 3/4 x 18 9/16 in.). Medium: tempera on panel. Museum: National Gallery of Art, Washington DC. Author: FRA ANGELIC