Nice find. It looks like they are probably Mexican fan palms, they dont look too happy there, but thats probably because the summers dont get very warm. They are probably outside year round because Nantes, France is a usda zone 9, maybe a 9b. If they did have to move the pots around, then it would definitely take a forklift (maybe even a crane or something) to get the job done.

Thanks for sharing.

Strange that they would keep them containerized if in fact the climate is a 9. They probably would much happier in the ground--containers are MUCH colder than the ground in Winter. One of these years, I am going to plant one experimentally (protecting the tops).

Man,look at the size of the bamboo blinds covering that glass house!

Hi
What exactly is that structure?? Gh?? Interesting roof treatment appears to be glass under bamboo shutters??
Wonder what the pipe like structure is used for looks like a catwalk?? gary

I think its a palm house or orangery. All i know is its really old.

That area of France is very mild. Only a few times this winter have they been into the teens and they have been in the 50's Dec/Jan/Feb... i also think its been an overall cold winter in Europe. The Atlantic keeps them warm, considering they sit at 47N ...which is NORTH of me! and i can't hit 32F.