Amphorae were containers used to transport and trade liquid (wine, oil) and solid food (wheat, capers, olives, meat, salted fish and fish sauce or garum, etc.).
They were placed in the hold of the ship according to a precise order that, during the excavation of a wreck, can be recognised by the arrangement of the amphorae lying on the seabed in several layers.
Identifying the production plant of an amphora makes it possible to define the trade relations between the various production centres by reconstructing the trade route followed by the ship before it was wrecked.