Ostiense is the 10th quartiere of Rome, identified by the initials Q. X.
The toponym comes from the original name of the Porta San Paolo, a gate in the city walls of Rome, was Porta Ostiensis, because it was located at the beginning of Via Ostiense. It now houses the Via Ostiense Museum.
Wikipedia https://en.wikipedia.org/wiki/Ostiense
Coordinates 41°51'32.028" N 12°28'49.278" E
