Sant'Ambrogio e Carlo al Corso (usually known simply as San Carlo al Corso) is a basilica church in Rome, Italy, facing onto the central part of the Via del Corso. The apse of the church faces across the street, the Mausoleum of Augustus on Via di Ripetta. This church is dedicated to Saint Ambrose and Saint Charles Borromeo, the patron saints of Milan. It is one of at least three churches in Rome dedicated to Borromeo, others including San Carlo ai Catinari and San Carlo alle Quattro Fontane. Construction The church of the Saints Ambrogio and Carlo al Corso is the national church of the Lombards, to whom in 1471 Pope Sixtus IV gave, in recognition of their valuable construction work of the Sistine Chapel, the small church of S. Niccolò del Tufo, which was first restored and then dedicated to S. Ambrogio, the patron saint of Milan. Its construction was begun in honour of the canonization of St. Charles Borromeo in 1610, under the direction of Onorio Longhi and, after his death, of his son Martino Longhi the Younger. The site was that of the former church of San Nicola de Tofo. The ground plan is based on the Latin cross. The dome, resembling that of Santi Luca e Martina, was designed by Pietro da Cortona (1668), who was also responsible for the apse and rich internal decorations. The façade was designed by Cardinal Luigi Alessandro Omodei, who financed the completion of the church, and did not like the project prepared by Carlo Rainaldi. Decoration The central vault is frescoed with a Fall of the Rebel Angels (1677–1679) by Giacinto Brandi. The altarpiece, depicting the Saints Ambrose and Charles Borromeo with the Virgin and Jesus, was painted around 1685–1690 by Carlo Maratta. The stucco decoration was by Giacomo and Cosimo Fancelli. The statue of the saints were by Francesco Cavallini. Frescos of Justice and Peace were painted by Girolamo Troppa. There are also paintings by the baroque painter Giovanni Battista Beinaschi. In the ambulatory behind the sanctuary is a niche where a reliquary containing the heart of St Charles is kept. It was donated to the church in 1614 by Cardinal Federico Borromeo, a cousin of the saint. The 16th-century oratory of St. Ambrose is beyond the left transept. The first chapel on the right is dedicated to the Crucifixion and has a fresco of Vigilance by Paolo Albertoni.