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

PORTA MUGONIA

one of the three gates of the early Palatine city (Varro, LL v. 164), also called vetus porta Palatii (Liv. i. I. 12; 3. 9). It was on the north side of the hill, near the temple of Jupiter Stator (Liv. locc. citt. ; Solin. i. 24; Dionys. ii. 50; Non. 531; cf. Ov. Trist. iii. I. 31), where the ridge of the Velia joins the Palatine and the cattle of the early settlers must have been driven in and out (Jord. i. I. 174, 176, 177; Richter 34, 133, 140, 145; Gilb. i. 159, 309; iii. 46, 423). The existing street of imperial times (see CLIVUS PALATINUS) corresponds in general with the early one.

The name appears in several variants-Mugionis (Non.), Mugionia (Festus 144), Mucionis (Varro), Mugonia (Solin.), and is derived by Varro from the lowing (mugitus) of the cattle, but by Festus a Mugio quodam qui eidem tuendae praefuit. The true derivation is not known (Jord. i. I. 176, n. 39; cf. BC 1914, 78-79).