Cleveland Museum of Art 122520 portrait Luca della Robbia (Italian, 1400?–1482) c. 1460–1470 CC0 cma sacred-art objects-with-gravity sacred art objects with gravity madonna child sculpture relief italian renaissance marble religious art mother and child floral blue brown wood frame crest patronage classicism and Luca della Robbia (Italian, 1400?–1482) c. 1460–1470 Italy, 15th century glazed terracotta Sculpture European Religious Sacred & Devotional Objects with Gravity