Q.Archaeologists who work on the remains of pottery are a bit like detectives. Can you explain why? Also, what can amphorae tell us about the economic life of the Mediterranean in the Roman period?

Archaeologists studying pottery act like detectives because a single sherd can reveal far more than its surface shows. The fabric, the shape, the firing technique, and even the residue inside the vessel all carry clues about how it was made, where it came from, and what it held. By piecing these fragments together, they reconstruct trade routes, daily habits, and even social status — much like a detective reconstructs a crime from scattered evidence. …

Think of a broken pot lying in the dust. To most of us, it is just a shard. To an archaeologist, it is a fingerprint, a receipt, a postcard from a vanished world. The comparison to a detective is not a flourish — it is the working reality of the discipline. A detective reads a crime scene through clues that seem trivial: a scuff mark, a torn thread, a smudge of ash. The archaeologist reads a settlement or a shipwreck through the same lens, and pottery is the most abundant, most durable, and most talkative clue they have.

Why pottery? Because clay, once fired, does not rot, rust, or dissolve. Wood perishes, cloth vanishes, metal corrodes into a lump. But a sherd of pottery can survive millennia, lying exactly where it was dropped or dumped. And because pottery was cheap and universal — every household, every kitchen, every tavern used it — it turns up in enormous quantities. That sheer volume is the first gift. The second is that pottery styles changed over time, often quite quickly. A particular rim shape, a handle curve, a painted motif, a clay fabric — these are like fashion trends, but far more rigid. A potter in a given region and century made pots in a recognisable local way. So when an archaeologist finds a sherd, they can often say: this was made in such-and-such a place, in such-and-such a period. That single piece of information dates the layer it was found in, and links that site to a wider network of production and exchange.

That is the detective work. The archaeologist pieces together broken fragments, sometimes literally reconstructing a vessel from dozens of sherds, like fitting together a shattered jigsaw. They compare the clay under a microscope or by touch — the temper, the grit, the colour — to identify the source. They notice wear marks: a pot used for cooking has soot on the outside; a storage jar shows scrape marks from a ladle. They even study the residues left inside, which can reveal what was stored — oil, wine, grain, fish sauce. None of this is glamorous, but it is devastatingly effective. A single amphora sherd found far from its place of manufacture is proof of trade; a cluster of them from the same source suggests a regular route; a change in their style over time charts the rise and fall of that trade.

Now, amphorae. These are the great two-handled jars of the ancient Mediterranean, the shipping containers of the Roman world. They were mass-produced, often stamped with the potter’s or the estate’s mark, and designed for one purpose: to move liquids and semi-liquids across the sea. Wine, olive oil, fish sauce (garum), even pickled fish — all travelled in amphorae. Their shape was not decorative. The narrow neck and pointed base meant they could be stacked in a ship’s hold, wedged upright in sand or racks, and carried by two men using the handles. The pointed toe also allowed the dregs to settle, and the jar to be tilted for pouring.

What do they tell us about economic life? Start with the stamps. Many amphorae carry a maker’s mark — the name of the estate, the potter, sometimes the consul’s name, which gives a precise date. This is like a barcode. When the same stamped amphora turns up in Rome, in Gaul, in Britain, and in Egypt, we know that a single producer’s goods were being shipped across the entire empire. That is not just trade; that is organised, large-scale, commercial agriculture, with estates producing surplus specifically for export. The amphora itself is the evidence of that surplus.

Then consider the contents. By analysing residues, or by the shape of the jar (wine amphorae differ from oil amphorae), archaeologists can map what was being consumed where. For example, the discovery of many olive-oil amphorae from a particular Spanish region at a Roman military camp on the Rhine tells us that the army’s supply chain was a vast, state-organised operation, moving food thousands of kilometres. The presence of wine amphorae in Britain, where grapes did not grow well, shows that even a provincial frontier was plugged into Mediterranean tastes. The absence of a type of amphora can be just as telling — if a region stops importing a certain jar, it may mean local production replaced it, or that the trade route collapsed. …