Rione XXII Prati on Tavola 22, a regular grid between the Vatican and the Tiber, centred on Piazza Cola di Rienzo and ending at the Palazzo di Giustizia.
Source: Old map, public domain
Viale delle Milizie runs yellow along the top, with Via Giulio Cesare and Via Germanico crossing the dense grid below. Streets named for Roman figures, among them Cola di Rienzo, Plinio, Catullo and Pompeo Magno, fill the middle, and Piazza Cavour opens in front of the law courts.
