Cleveland Museum of Art 107310 portrait 950–1025 CC0 cma sacred-art portraits landscapes objects-with-gravity sacred art objects with gravity ivory religious art byzantine virgin mary child jesus icon relief sculpture medieval roman gold leaf pale seated cherubic ornate detailed religious portrait monochromatic plaque enthroned mother god the stroganoff 950–1025 Byzantium, Constantinople, Byzantine period ivory Ivory Religious Sacred & Devotional Faces in Time Horizons & Places Objects with Gravity