The temple of Vesta (on the Forum Romanum).
The last three standing columns of the temple of Castor and Pollux.
"Do you ask the way? I will tell you. You will go along by the temple of Castor, near that of ancient Vesta, and that goddess's virgin home. Thence you will pass to the majestic Palatine edifice on the sacred hill, where glitters many a statue of the supreme ruler of the empire. [...]"
Martialis - Epigrams I 70
Translated by Bohn