This tiny church is a masterpiece of Roman baroque. It was Borromini’s first church, and the play of convex and concave surfaces and the dome illuminated by hidden windows cleverly transform the small space into a place of light and beauty.
The church, completed in 1641, stands at the intersection known as the Quattro Fontane , after the late-16th-century fountains on its four corners, representing Fidelity, Strength and the rivers Arno and Tiber. A clean-up job was completed in 2015, and they look better than they have for years – just watch out for traffic as you admire them.
Borromini intended to be buried within the church, but its monks would not permit this because of his suicide.