I live in ljubljana, which used to be an old roman town many years ago.

Half a city is built on roman remains, which means that every construction project will be delayed for many months. Major road closed for a few weeks to replace the sewer pipes below it? Nope, three+ months of archeologists with brushes looking at stones first. Was the road and the pipes replaced 20, 30 years ago? Yep. And 30 years before that? Also yep. Did they brush every stone back then? Yes they did. Will they do it again? Sure.