In his basement? Apparently plus other weapons! All WW2 and apparently mainly unusable but still, how big is his pigging basement?
I thought this was going to be a joke given the title Looked it up and found its a genuine story https://www.bbc.co.uk/news/world-europe-57965260 A Panther tank in his basement takes some beating - though there is a guy near me who has an old WW2 tank (Sherman?) and tank track in his garden along with antique fire engines and other stuff - he has a big garden though - the fence I walk along on one of our footpaths is at least 100yards long. The tank was running a couple of years ago as you could see him driving round the track in it.
There must be loads of stuff across Europe still intact. The Panther looks in great knick, hopefully it can get into a museum.