This has been reconstructed by R. Gamberini Mongenet using fragments of architecture found in the vicinity and in conformance with coins of Augustus showing a triple arch of an unusual type, a lofty central arch with an inscribed attic surmounted by a quadriga flanked by lower post-and-lintel fornices to either side that are supported on columns and surmounted by triangular gables crowned by figures of barbarians offering standards to the triumphator (B. M. Coins, Rom. Rep. 2.50 nos. 4477-78; see also Nash 1.92-101). Other coins showing more conventional arches may allude to arches erected to Augustus elsewhere (B. M. Coins, Rom. Rep. 2.551 no. 310; B. M. Coins, Rom. Emp. 1.73-74 Aug. nos. 427-29).

If the architectural fragments assigned to this arch are correctly assigned, it was very elaborately decorated, the Doric capitals having the echinus carved with an egg molding, and the modillions treated as massed guttae. The Fasti Capitolini Consulares et Triumphales were inscribed on the reveals of this arch and not on the Regia, as had been earlier supposed. See Degrassi, Inscript. Ital. 13.1.1-142, especially 17-19 and pls. 8-10.

RömMitt 85 (1978): 371-84 (H.-W. Ritter); Kaiser Augustus und die verlorene Republik (show catalogue, Berlin 1988, Mainz 1988), 224-39 (E. Nedergaard); JRA 2 (1989): 198-200 (F. Kleiner).