Just off the city center is a large, gleaming pyramid. This is the tomb of Caius Cestius and it was constructed between 18 and 12 BC. At the time of its construction, it would have been in an open area; the city had not yet spread to this point. The Roman walls constructed under Marcus Aurelius in the 270s actually used this pyramid as part of the walls. If you travel on the subway in Rome, Pryamide is a subway stop, and the stop is connected to Rome's secondary train stat