To those from the Western hemisphere, it’s always fascinating to hear that some homes and businesses from the times of the Greek philosophers still have inhabitants, and then you remember that the Western hemisphere is itself not without its own examples, for example some Mexican villages still have temples from the times of the Mayans.
I actually don’t know. The area I now live in was partially wiped out by the tsunami in 2011 closer to the coast. We definitely have some buildings that are a few hundred years old that are still in use. Different parts of Japan have older, but it’s almost always a Ship of Theseus sort of situation.