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 come from England but now I live in Western Canada. The oldest building is apparently a little wooden schoolhouse from the mid-1840s.
The likely oldest standing building in Canada is from 1637, a Jesuit mission house.