The American College's chapel, the full name of which is "Santa Maria Assunta al monastero dell’Umiltà" ("Saint Mary of the Assumption at Humility Monastery"), was originally the church attached to the monastery founded by Francesca Baglioni Orsini. The cornerstone was laid on March 7, 1601. The original church, which was finished about a decade later, was entirely rebuilt between 1641 and 1646 and it is that second structure that rises on the site today. The architect was Paolo Maruscelli, a Florentine. Although some details of its decoration have changed throughout the centuries, "the victim of later, more elaborate and flamboyant tastes," the architectural plan and basic structure remain the same today. A notable later addition is the highly ornate carved wooden organ loft, the work of Sebastiano Moroni in 1735.