One of the stonemasons swung at an interior wall in Brittany and hit something that rattled instead of cracking.

Inside the wall was a metal box, and inside the box was gold. Property owner François Mion told AFP, in remarks carried by News24, that the box had been jammed between the stones. A few days later the same crew found the other half of the hoard, a cloth pouch stashed above a beam in a different wall.

Two hundred and thirty-nine gold coins, in a manor house at Plozévet in Finistère, undisturbed for roughly three centuries.

What was in the wall

The earliest coin was struck in 1638, under Louis XIII. The most recent came out of a mint in 1692, well into the long reign of Louis XIV. Between those dates the hoard spans 19 different towns. French coinage was struck in workshops scattered across the country until production was centralised in the 1970s, as documented by Barnebys, which also confirmed that the regional preventive archaeology service authenticated the lot.

Mion called the authorities and the find went away to be studied, which is why nobody outside Plozévet heard about any of this for two years.

Why a wall counted as a bank

Why hide gold in a wall in the first place? There was no branch to walk into. A prosperous rural household in the 1600s held its wealth in metal, in a strongbox, in the roof, or behind granite, and turning a good harvest into gold was a sensible move. Splitting the stash across two hiding places suggests whoever did it gave the matter some thought.

A wall pays no interest and never goes under.

Those dates hint at something sharper too. Smithsonian magazine reported that the newest coins in the stash were probably minted during a series of monetary reforms Louis XIV pushed through to pay for his very expensive wars. A king reshuffling the coinage is a decent reason to get your gold out of circulation and into masonry.

Whose money it was

Nobody can name the person who put it there. Researchers working on the hoard traced several families through the property between the 13th and 18th centuries and read the coins as ordinary household savings, per the same Barnebys account. Auctioneer Florian d’Oysonville went slightly further, calling the hoard the accumulated savings of a wealthy merchant or a substantial farmer, in remarks reported by La Presse.

That is a reading of the evidence rather than a documented fact, and it leaves the interesting question untouched. Whoever hid the second bag above the beam never came back for it, and nobody who lived in the house afterward did either. Sudden death, or a secret kept a little too well, covers most of the plausible explanations.

The law that missed the owners by four years

France changed the rules on this sort of luck in 2016. Article L541-4 of the Code du patrimoine, added by the heritage law of 7 July 2016 and published on Légifrance, presumes that movable archaeological objects belong to the state when they turn up on land bought after that date. Civil Code provisions that used to hand such finds to the landowner stopped applying.

The Mions bought the property in 2012, which puts them under the older regime in the next article, L541-5. Under it, the state takes the objects for scientific study for up to five years, then notifies the owner and the finder of their rights.

That cut-off falls four years after the date on their deed. Buy the place today and the coins belong to the state outright. Buy it in 2012, as the Mions did, and this became a payday instead.

Five hours in Angers

Four coins went into a drawer as keepsakes. The other 235 went to auction on 29 September 2021, estimated as a group at €250,000 to €300,000. Sold one at a time, they made €830,000 before fees and just over €1 million with them, according to the sale report published by Ivoire Angers/Deloys, the auction house that handled the treasure. Bids came in from the room, the phone and the internet at once, and d’Oysonville stood at the rostrum for five hours getting through the lots.

A single Louis d’or from 1640 stamped with the Templar cross carried an estimate of €7,000 to €8,000 and sold for €56,120 including fees. The proceeds were split down the middle, half to the couple and half to the three stonemasons, one of them a Compagnon du Devoir, a title from France’s historic craft guilds.

Buyers included the Monnaie de Paris, the state mint, which exercised its legal right to pre-empt lots at auction and took 19 pieces. It paid market rates to recover a small handful of its own output, roughly 350 years after its workshops let it go.