Domenico Fontana
The obelisk was discovered in 1587, broken into three pieces, together with the Lateran Obelisk; and it was erected in the Piazza del Popolo by Domenico Fontana in 1589, at the command of Pope Sixtus V. Sixtus had the Septizodium demolished to provide the travertine for the obelisk's pedestal, among other building projects.