The Department of Ancient Near Eastern Art covers both a lengthy chronological span and a vast geographical area. The collection of more than seven thousand works of art ranges in date from 8000 B.C. (the Neolithic period) to the Arab conquest and rise of Islam beginning in A.D. 651. The works come from ancient Mesopotamia, Iran, Syria, Anatolia, and other lands in the region that extends from the Black and Caspian Seas in the north to the southwestern Arabian peninsula, and from western Turkey on the Mediterranean Sea to the Indus River Valley in modern-day Pakistan and India. Societies throughout the ancient Near East maintained commercial and cultural contacts across great distances, although the routes, trade goods, and artistic styles and motifs that were exchanged varied in different periods.