Cleveland Museum of Art 137333 portrait Niccolò di Segna (Italian) c. 1340 CC0 cma sacred-art portraits objects-with-gravity sacred art objects with gravity angel renaissance italian art religious art portrait gold brown muted colors serene contemplative triangle frame oil painting medieval graceful detailed classical human figure halo soft light pinnacle Niccolò di Segna (Italian) c. 1340 Italy, Siena tempera and gold on wood panel Painting European Religious Sacred & Devotional Faces in Time Objects with Gravity