The obelisk in Piazza Montecitorio was first put up in Heliopolis, Egypt by pharaoh Psamtik II (c. 500 BC). Augustus brought it to Rome to celebrate his victory over Cleopatra and set it up in the Campus Martius, where it served as the gnomon of an immense sundial. In 1748 it was discovere buried in an open space near the Palazzo dei Montecitorio and was erected in its present site in 1792. Today the Palazzo de Montecitorio is the seat of the Italian parliament.