The obelisk, known as the Flaminio Obelisk or the Popolo Obelisk, is the second oldest and one of the tallest obelisks in Rome (some 24 m high, or 36 m including its plinth). The obelisk was brought to Rome in 10 BC by order of Augustus and originally set up in the Circus Maximus. It was re-erected here in the piazza by the architect-engineer Domenico Fontana in 1589 as part of the urban plan of Sixtus V. The piazza also formerly contained a central fountain, which was moved to the Piazza Nicosia in 1818, when fountains, in the form of Egyptian-style lions, were added around the base of the obelisk.[3]