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 don’t live there anymore, and it’s not the oldest building, but there is a pub in Dublin that’s been running since 1198, they claim to be Ireland’s oldest pub but IIRC the claim is a bit bogus.