...In addition to the amphorae, archaeologists found ropes, shoes, a wooden drill and organic "dunnage" or matting, made from vine shoots and grass, that was used to protect the ship's hull from the cargo, Cau said...Many of the amphorae contained the remnants of fish sauce, while others held oil from plants — likely olives, wine, and perhaps olives preserved in vinegar. The distinctive amphorae for different products were labeled with painted inscriptions known as "tituli picti" in Latin, he said...Previous studies found that many of the oil amphorae had seals stamped with a "Chrismon," or Christian monogram — similar to...