I suspect that there is a degree of translation loss in those quotes.
In general if you ask someone about this they'll indeed reply that their temple is 1,000 years old (example). Then if you ask whether this means that this building right here is 1,000 years old they'll may very naturally reply that no, they rebuild it every so often.
I'm thinking that the concept of e.g. 'temple' might be different than the actual buildings the temple is made of.
Now, sometimes the buildings really are hundreds of years old.