According to legend, Augustus once ordered a temple erected on this spot, on the Capitoline Hill, where a sibyl foretold the coming of Christ. The current church, built for the Franciscans in the 13th century, boasts a coffered Renaissance ceiling and the tomb of Giovanni Crivelli (1432) carved by the great Renaissance sculptor Donatello. The Cappella Bufalini ★ (first chapel on the right) was frescoed by Pinturicchio with scenes of the life and death of St. Bernardino of Siena. A chapel behind the altar contains the Santo Bambino, a devotional wooden figure of the Baby Jesus, which is venerated annually on Christmas Eve. The long flight of stairs leading up to the church was built in 1348 to celebrate the end of the Black Plague.