Cleveland Museum of Art 137334 portrait Niccolò di Segna (Italian) c. 1340 CC0 cma sacred-art portraits objects-with-gravity sacred art objects with gravity angel renaissance painting italian art religious halo gold portrait muted colors medieval serene frame gilded classical figure still life pinnacle Niccolò di Segna (Italian) c. 1340 Italy, Siena tempera and gold on wood Painting European Religious Sacred & Devotional Faces in Time Objects with Gravity