San Carlo alle Quattro Fontane was commissioned by Cardinal Francesco Barberini in 1634 for the Holy Order of the Trinity; construction began in 1638 and the church was consecrated in 1646. Frank Dabell, Dr. Beth Harris, and Dr. Steven Zucker provide a description, historical perspective, and analysis of Borromini’s San Carlo alle Quattro Fontane.

Francesco Borromini, San Carlo alle Quattro Fontane (“Carlino”), Rome, 1634–1646.