The so-called "Arco Etrusco" is one of the gates of ancient Perusia. The gate dates originally from the third century B.C. when it was one of seven gates in the Etruscan wall. In 40 B.C. it was refashioned under Augustus.
Description via Pleiades. Coordinates and heritage data from the Atika atlas.
Atika pings you when you walk or drive past heritage like this. Works offline, no account needed to explore.