Cleveland Museum of Art 108502 square c. 1100–1125 CC0 cma sacred-art portraits objects-with-gravity sacred art objects with gravity ivory relief roman biblical religious portrait figure medieval sculpture paleontology beige cream antique detail historical religious art carving portraiture plaque portable altar zacharias the c. 1100–1125 Germany, Rhine Valley, Cologne?, Romanesque period, 12th century ivory Ivory Religious Sacred & Devotional Faces in Time Objects with Gravity