<p>Stables for the horses belonging to the racing teams (<i>factiones</i>) in Rome, located in the W *Campus Martius near the *Trigarium (<i>Reg. Cats., Regio IX: stabula ... factionum</i>; Nordh 86, Coarelli). In the Augustan period there were four <i>factiones</i>: <i>Albata</i>, <i>Prasina</i>, <i>Russea</i>, and <i>Veneta</i>.</p> <p>The <i>factio Prasina</i> was located near the Church of S. Lorenzo in Damaso, which retained the topographical attribute in its alternate mediaeval name: S. Laurentii in Prasino; an inscription mentioning the <i>statio Prasina</i> was found <i>in situ</i> nearby (<i>CIL</i> VI 10058). This area is marked by an index number on our map. About 50 m to the E, the possible remains of the <i>factio Veneta</i> were unearthed beneath Palazzo Regis and Palazzo Farnese (Lanciani, <i>FUR</i> pl. 20). Although the locations of the other two <i>factiones</i> are unknown, several inscriptions found within a restricted area (<i>CIL</i> XV 7254; <i>ILS</i> 5310; <i>CIL</i> VI 10045, 10077, 33945) suggest that the two stables were located next to each other. Moreover, corroborating evidence for this location is offered by the existence of the V[ICVS STA]BLARIVS in this area (Rodríguez Almeida, <i>Forma</i> frags. 272, 275, 285; contra, Castagnoli 1985, 207 n.9, who restores V[ICVS BV]BLARIVS).</p>