Maria in Gradi has important monuments in it, like the Renaissance cloister supported by 160 columns, the other medieval cloister built towards the end of 1400, on order of brother Domenico Valentini, with a central fountain, the elegant porch in front of the facade of the church, where he was crowned Pope Urban IV was buried and where Pope Clement IV.In 1500 the church was destroyed but was rebuilt in 1700 by the Dominicans, who entrusted the work to Nicholas Salvi, author of the Trevi Fountain in Rome