I was recently in Rome for the first time (a stopover before getting the train from Rome to Sicily) and noticed that many of the manhole covers in the streets had the initials SPQR cast into them.
For the uninitiated, this stands for “Senatus PopulusQue Romanus” in Latin, or “the Senate and the People of Rome” in English.
It is interesting to see the use of Latin in modern era infrastructure.