Quartiere XXIX Ponte Mammolo on Tavola 51, hill country around the Rebibbia prison buildings, bounded by Pietralata, Monte Sacro Alto and San Basilio.
Source: Old map, public domain
The prison compound is drawn as a set of E- and H-shaped blocks in the middle, with the settlement of Ponte Mammolo to its southeast. A blue-washed area numbered 38 and the Casale dei Pazzi mark the lower left, and a river curls round the east.