Pope Nicholas IV, a former Minister-General of the Order of Franciscans, raised the church to the status of Papal Church in 1288. The Piazza del Loge, the square leading to the church, is surrounded by colonnades constructed in 1474. They housed the numerous pilgrims flocking to this church. In 1818, the remains of Saint Francis were rediscovered beneath the floor of the Lower Basilica. In the reign of Pope Pius VII the crypt was built so that the faithful might visit the burial place of the saint.