Treasure Time!

Thinking about renovating an old house? Be prepared — sometimes, the walls hold more than just dust and cobwebs. 

When you start peeling back the layers of history, you never really know what secrets are waiting to be uncovered behind the plaster, under the floorboards, or tucked away in the rafters. 

Over the years, working on historic homes has taught me one thing: the past has a way of revealing itself in the most unexpected — and sometimes downright astonishing — ways.

This month, I’m stepping away from the usual building tips to share something a little different… and a little fun. In my time restoring old properties, I’ve come across my fair share of curious finds. 

There was the mummified witch’s cat hidden inside a wall, a handful of WWII bullets buried beneath old floorboards, and even a set of wartime bread tokens carefully stashed away as if someone planned to return for them one day. Sadly, no gold yet — but hope springs eternal!

I’ve heard plenty of stories from others who’ve uncovered far bigger surprises: antique firearms, grenades, forgotten family heirlooms, and lots of clogs! And that’s what inspired today’s blog — a dive into some of the most headline-worthy discoveries made during home renovations across France. 

From gold bars to Cézanne paintings, from shipwrecks to skeletons, these stories are proof that history lingers quietly beneath our feet… until a hammer, drill, or crowbar brings it back to light.

Take the small village of Castillonnès, for example, where a stash of 1,000 ancient gold coins was discovered inside a house once owned by Paul Narce, who passed away in 2024 at the age of 89. The new owners struck literal gold, and the find eventually went to auction in 2025, fetching over €3 million.

Then there was Morez, in the Jura region, where the local mairie purchased a property and stumbled upon five gold bars and 1,000 coins tucked away inside — a discovery valued at around €600,000.

Sometimes, the treasure is just as dramatic but hidden in far subtler ways. In Brittany, a team of builders renovating a historic mansion in 2019 cracked open a concealed wall to find a metal box filled with centuries-old gold coins, ultimately valued at €300,000.

And in another case from 2016, a man who inherited a relative’s property discovered 5,000 gold pieces, two massive 12kg bars, and 37 one-kilo ingots carefully hidden around the home — a find worth millions.

But not all treasures are made of gold. In 2023, at the childhood home of famed painter Paul Cézanne, renovators uncovered a previously unknown work believed to be painted by Cézanne himself, hidden beneath layers of plaster.

And just a few years earlier, in 2019, an elderly woman living in Normandy discovered that the “Greek icon” hanging quietly in her kitchen was in fact a rare 13th-century masterpiece. When it went to auction, it fetched an astonishing €24.2 million.

Of course, sometimes what’s hidden isn’t treasure at all — and those discoveries can be haunting. In 2023, in Corbeil-Essonnes, just south of Paris, a homeowner renovating their basement broke through a wall and unearthed a human skeleton.

Archaeologists were called in, and their investigation revealed something truly remarkable: 38 skeletons and 10 plaster sarcophagi, remnants of a 1,500-year-old medieval cemetery buried beneath the modern home.

Not every hidden story ends in celebration. In Brittany in 2017, one man became convinced his brother-in-law’s family had uncovered Nazi treasure hidden in their property. Overcome by paranoia and obsession, he tragically murdered them — despite there being no evidence that any such hoard existed.

Then there are the tales that play out beyond the land. Off the coast of Belle-Île in Brittany, an American couple in their 80s became embroiled in a years-long legal battle after authorities discovered they possessed 23 gold bars salvaged from a shipwreck.

Sixteen of those bars had already been sold — some even on eBay — and the couple once famously appeared on the Antiques Roadshow, claiming one bar came from South Africa!

And sometimes, treasure hides in plain sight — beneath your feet, quite literally. In Auvergne, a farmer discovered a gold vein on his land worth an estimated €4 billion. The French state swiftly declared the find of national interest and assumed control of the site. The farmer, sadly, only received modest compensation.

But if there’s one story that perfectly captures both the thrill and the risk of these discoveries, it’s the cautionary tale from Normandy in 2014. Three builders renovating a property stumbled across 16 gold bars and 600 U.S. $20 gold coins hidden since World War II — a stash valued at around €900,000.

Temptation won out, and instead of reporting the find, they began secretly selling off the treasure. Unfortunately, one of the workers deposited a suspicious €270,000 cheque, which alerted tax authorities. Before long, the police were involved, assets were seized, and the “lucky” find turned into a financial and legal disaster.

These stories remind us of an important lesson: when you renovate an old property, always expect the unexpected. That creaky floorboard, dusty attic, or cracked basement wall might be hiding a slice of history… or even a fortune. 

But remember, since 2016, any treasure discovered legally belongs to the state — unless your property was purchased before that date — and yes, it’s taxed. This is France, after all!

So, here’s the question: if you stumbled upon a hidden treasure while renovating, would you report it — or keep it secret?

And if your renovation dreams involve something a little less dramatic like fresh interiors, or restoring character to your own home — we’d love to help- single room to total renovation.

If you have a building project in the 22 or 56 regions, take a look at our website www.mc-renovation.com, where you’ll find photos, videos, client testimonials, magazine features, and plenty of inspiration for your next project.