In 1586 he set up the obelisk in the Square of St. Peter's, of which he gives an account in "Della transportatione dell'obelisco Vaticano e delle fabriche di Sisto V" (Rome, 1590).
In 1586 he erected the 327 ton obelisk in the Square of St. Peter's. He gives a detailed account of it in "Della transportatione dell'obelisco Vaticano e delle fabriche di Sisto V" (Rome, 1590).