Quartiere XX Ardeatino, sector A, on Tavola 42, a long thin strip along Via Cristoforo Colombo with numbered plots in yellow and orange.
Source: Old map, public domain
Viale Pico della Mirandola and Via Cristoforo Colombo run east to west through blocks shaded yellow, orange and pink, with numbers such as 37 and 45 on large lots. To the right the road net spreads towards the Ostiense and Appio-Latino edges and the Rione San Saba corner.