Crucifixion Diptych (van der Weyden) that they could be the left and center panels of a triptych, that they formed either the wings or shutters of an altarpiece, or that they were intended to decorate an organ case. The train of the Virgin's robe continues onto the right panel, which evidences that the panels were intended to lay side-by-side rather than separated (as the wings of an altarpiece would have been). Art historian E. P. Richardson proposed that they were the center panel of the lost Cambrai altarpiece (executed between 1455 and 1459), a single painting now split into two parts. Art historian Penny Howell
San Marco Altarpiece San Marco Altarpiece The San Marco Altarpiece (also known as "Madonna and Saints") is a painting by the Italian early Renaissance painter Fra Angelico, housed in the San Marco Museum of Florence, Italy. It was commissioned by Cosimo de' Medici the Elder, and was completed sometime between 1438 and 1443. In addition to the main panel depicting the enthroned Virgin and Child surrounded by Angels and Saints, there were 9 predella panels accompanying it, narrating the legend of the patron saints, Saints Cosmas and Damian. Only the main panel actually remains to be seen in the Convent of San Marco,