Source: Bijan. CC.
Ancient objects subject to seizure at the American border include those made of stone, metal, ceramic, bone, ivory, glass, faience, textile, papyrus, paint, mosaic, wood, glass, and parchment. The import restrictions cover sculptures, sarcophagi, reliefs, furniture, vessels, tools, weapons and armor, coins, beads, pottery, musical instruments, documents, paintings, floor mosaics, and more.
Lawful entries of these specified cultural objects are permitted in certain cases. For example, a valid export permit from Greek authorities would allow an archaeological or ethnological cultural object to enter the US border.