Ynys Mon (Anglesey)

Nearly everything the general reader believes about druids comes from a few paragraphs of Tacitus about this island, and they should be read as what they are.

The passage. In Annals Book XIV, Tacitus describes the Roman assault on Mona under Suetonius Paulinus in AD 60 or 61: infantry ferried across the strait in flat-bottomed boats, cavalry swimming their horses; on the far shore a line of armed men, with women in black running among them with dishevelled hair and torches, and druids with their hands raised to the sky calling down curses. The soldiers were unnerved, then advanced, cut them down, and destroyed the groves, which Tacitus says were dedicated to savage rites and drenched in the blood of prisoners.

The problems are stacked. Tacitus was writing roughly fifty years after the event. He was not present and neither was any source he names. He was describing an enemy whose extermination the passage exists to justify, in a genre where barbarian religion is conventionally rendered as bloody. And the detail that gives it its power, the wild women, the cursing priests, is precisely the sort of thing that reads as a literary set-piece.

None of this makes it fiction. Druids existed, and there is independent evidence for ritual killing in Iron Age northwestern Europe. It makes it a hostile secondary account whose specifics cannot be checked, and it is doing far more work in the popular picture than a single such passage can bear. Nothing found on Anglesey has confirmed it.

What the ground gave up instead. In 1943, during construction of a wartime airfield at Llyn Cerrig Bach, workers dragging peat for runway fill pulled up a chain and then a hoard: more than 150 objects of iron and bronze deposited in a former lake over roughly two centuries. Swords, spearheads, shield fittings, chariot and harness gear, cauldrons, a trumpet, and two gang-chains for holding prisoners or slaves by the neck.

The material comes from all over Britain and beyond, not just from Anglesey, which means objects were brought a long way to be given to this water. It is the clearest evidence anywhere in Britain for the practice of depositing valuable things in water as offerings, and it is contemporary with the period Tacitus is writing about. It tells us something real about the island's religious importance, just not the thing the famous passage says.

Bryn Celli Ddu, a passage tomb on the island aligned to midsummer sunrise, draws gatherings at the solstice today.

A lake on Anglesey gave up more than a hundred and fifty objects to wartime airfield builders who had no idea they were digging into centuries of accumulated offerings.

Found while building a runway

In 1943, construction of a Royal Air Force airfield at Llyn Cerrig Bach disturbed the lake bed and revealed a large hoard of Iron Age metalwork, including chariot fittings, weapons, tools and slave chains, deposited into the water over what analysis suggests was a considerable span of time rather than in a single event, consistent with a long-running tradition of votive offerings made to the lake itself.

An island Rome specifically targeted

Roman writers described Anglesey as a stronghold of druidic resistance, which is part of why Roman forces under Suetonius Paulinus launched a deliberate assault on the island in 60 or 61 CE, a targeted campaign against the island's religious significance rather than an incidental conquest of unremarkable territory.

As this entry's companion article covers

The most frequently quoted ancient description of druids confronting Roman soldiers on the island's shore, and how that single vivid passage has shaped popular imagination of druidic religion, is addressed directly in this entry's companion article rather than repeated here.