Quartiere XVIII Tor di Quinto on Tavola 40, where the oval Ippodromo di Tor di Quinto and the Poligono Umberto I fill open ground east of a road web.
Source: Old map, public domain
The racecourse is lettered diagonally across its oval, and the Tiber loops below it in a heavy line. The streets of the original village lie at left along a central blue spine, with Zona LVI Grottarossa named at the top and the Poligono Umberto I in the middle.