Complex sentence: The interior with three naves has a number of travertine altars, the main altar was designed in 1724 by Giuseppe and Lazzaro Giosafatti, with a "Madonna del Rosario" by Luigi Devò flanked by marble statues or the allegories of Purity and Humility.
Split into simpler sentences: The interior with three naves has a number of travertine altars. The main altar was designed in 1724 by Giuseppe and Lazzaro Giosafatti, it is decorated with a "Madonna del Rosario" by Luigi Devò flanked by marble statues or the allegories of Purity and Humility.