An obelisk from Heliopolis in Egypt that the emperor Caius erected in the Circus Gaii et Neronis. It now stands in St. Peter's Square in Vatican City, having been re-erected there by Domenico Fontana in 1586.
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.