Parete

The Aurelian Walls were built between 271 and 275 C.E. during the reigns of Aurelian and Probus.  They were ordered built because the city of Rome had long outgrown the old Servian Wall built in the 4th century B.C.E. (which, interestingly, did not follow the Pomerium which was the legal and religious boundary of Rome.)
The walls reminded a bit of the city walls of Nanjing.