 The family assumed control over the bridges closest to their ancestral palace during the papal interregnum, levying charges on various types of traffic, including the Jews who lived in the nearby ghetto when burying their dead outside the city.The purchase of the territory of Giove in 1597 entitled the Mattei to the title "Marquis di Giove" (raised in 1643 to a dukedom) in addition to their older title of Nobile Romano.Other Mattei titles included "Duke of Paganica" and "Marquis di Belmonte".