Church of Santa Susanna
The Church of Santa Susanna was founded in the 9th century but its construction lasted until 1603, when the Baroque façade was completed by Carlo Maderno. From 1587 Pope Sixtus V made the church the seat of the female Cistercian monastic community of St. Bernard. As the Cistercian community was expropriated after 1870, the church was assigned to American cardinals in 1937 and served as the national church of American Catholics until 2017. It has now returned to its original use as a Cistercian monastery.