Porta Caelimontana and Porta Querquetulana were two city gates that opened in the Servian Wall in Rome; only the first one is still existing.
Wikipedia https://en.wikipedia.org/wiki/Porta_Caelimontana_and_Porta_Querquetulana
Address 10 Via di San Paolo della Croce, Roma 00184, Italy
Coordinates 41°53'8.19" N 12°29'42.642" E
