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

ARCUS NOVUS (DIOCLETIANI)

* mentioned in the Regionary Catalogue in Region VII, and ascribed to Diocletian in the Chronograph of 354 A.D. (p. 148). This is probably the marble arch, adorned with trophies, which spanned the via Lata, close to the north-east corner of the present church of S. Maria in via Lata, and was destroyed by Innocent VIII (1488-1492). The last remains disappeared in 1523 (LS i. 217). The fragments of a relief found at this point in the sixteenth century, and now in the Villa Medici, probably came from this arch. The inscription- VOTIS X VOTIS XX (CIL vi. 31383)-suggests that on the arch of Constantine. If this was the arch of Diocletian, and the inscription belongs to it, it was probably built in 303-304 (BC 1895, 46; Jord. ii. 102, 417; HJ 469; PBS iii. 271; Matz-Duhn, Antike Bildwerke 3525).