Quartiere IV Salario on Tavola 26, a triangle of straight streets between Viale Regina Margherita, Corso d'Italia and Via Nomentana, with Villa Albani inside.
Source: Old map, public domain
Piazza Buenos Aires and Piazza Margherita anchor the yellow Viale Regina Margherita along the top. Piazza Alessandria forms a small hub on the right, the formal garden of Villa Albani fills the centre left, and a circular piazzale at the lower right is lettered Porta Pia.