On the map of Florence that shows the city in schematic, idealised form, Leonardo indicates by name only 10 of the gates found in the city's second circle of walls, begun in 1284. He moves San Miniato and San Giorgio backward, and ends by indicating Porta San Pier Gattolini ("Ghattolini"), today's Porta Romana, in an erroneous position, coinciding with that of Porta di Camaldoli, situated today on the avenues at the level of Piazza Torquato Tasso. He omits not only Porta di Camaldoli, also known as Porta Volterrana, but also Porta dei Servi (now destroyed, it stood at what is today Piazza Isidoro del Lungo and facilitated the access of the faithful to the church of Santissima Annunziata), Porta La Croce (or Porta di Sant’Ambrogio, in what is now Piazza Beccaria) and Porta Guelfa (now destroyed, it was situated at the level of today's Via Ghibellina).
He takes no account of the sidegates that flanked Porta al Prato, although he studies the course of the Mugnone river that flowed beside it (obviously, prior to its deviation beyond the sixteenth-century Fortezza da Basso) and the "Sardigna", where the carcasses of animals were dumped (today in proximity to the Comunale Theatre).
