Why are ancient buildings still standing 1500+ years later, but some buildings built like 30 years ago are falling apart?

Question

Why are ancient buildings still standing 1500+ years later, but some buildings built like 30 years ago are falling apart?

In: Other

Answer 1

1. Survivor bias
2. Old buildings that are still around are made from thick stone, pretty much perfect to stand the test of time.
3. For hundreds of years we’ve actually been maintaining these older buildings, doubly helping them stick around

Fun fact time – If you live in America, my house is older than your country.