Being in continuous use makes it more likely that a building will last long, since otherwise people might tear it down to use the stones elsewhere. (E.g. what happened to the Colosseum.)
If you read up on "Roman concrete" you find out that it used a volcanic sand "pozzolana" [1] which is difficult to find in some parts of the world. There was, supposedly, some American professor trying to find a recipe for concrete that was as good as the Roman type but used more available materials. I don't know the current status.
The Pantheon in Rome is famous for having the world's largest unreinforced concrete dome: https://en.wikipedia.org/wiki/Pantheon,_Rome
Various Roman bridges are still in use: https://en.wikipedia.org/wiki/Ponte_di_Tiberio_(Rimini)
Being in continuous use makes it more likely that a building will last long, since otherwise people might tear it down to use the stones elsewhere. (E.g. what happened to the Colosseum.)