<p>An administrative division (<i>pagus</i>) of the Transtiberine region, possibly religious in character, known from two inscriptions. Found in 1861 between Piazza Mastai and S. Maria dell’Orto, and ascribed to the early 1st c. A.D. (Liverani; to the Republican period: Richardson), they mention the building activity of the <i>magistri</i> of the <i>pagus</i> in that area (<i>CIL</i> VI 2219=<i>ILS</i> 6079: MAG. [PA]G. IANICOL.; <i>CIL</i> VI 2220). These inscriptions offer valuable testimony for a built-up zone of Trans Tiberim not far from the city center (Coarelli 18; Liverani), as well as for the division of the Trans Tiberim into <i>pagi</i> (Richardson).</p> <p>The index number on our map marks the findspot of the inscriptions, and denotes the approximate vicinity of the building activities they mention; further, their position excludes the possibility of placing the *Naumachia on this site.</p>