Openwork plaque with a hybrid tree, Neo-Assyrian, ca. 9th?8th century B.C., Mesopotamia, Nimrud (ancient Kalhu), Assyrian, Ivory, 3 7/8 x 2 1/8 x 3/4 in. (9.9 x 5.5 x 1.8 cm), Ivory/Bone-Reliefs, Two sets of four curving, voluted branches grow upward