Samuel Ball Platner, Thomas Ashby, A Topographical Dictionary of Ancient Rome

PORTA COLLINA

a gate in the Servian wall at the north end of the agger, named Collina, because it was on the collis Quirinalis (Liv. ii. II. 7, 9; 64. 3; iii. 51. 10 et passim; Dionys. ii. 67; ix. 24. 68; App. BC i. 58, 93; Plut. Numa 10, Cam. 22, Sulla 29; de vir. ill. 75; Censorin. d.d. nat. r7. 8). At this gate the via Salaria and the via Nomentana divided (Strabo v. 234; Fest. 326). Some remains of it were found in 1872 in the Via Venti Settembre under the north-east corner of the Ministero delle Finanze (Mem. L. 2. ii. (1874-1875), 417-435, pl. iv.; BC 1876, 165-166, pl. xix.; Rosa, Relazione 1873, 33-34; Jord. i. I. 216-217, 221-222, 249, 252; RE iv. 48 ; Gilb. ii. 284). The porta Collina of the Middle Ages is defined as ad Castellum Adriani, and is a gate of the Leonine city. (It occurs under the form Collatina in Magister Gregorius, cf. JRS 1919, 20, 46.)