Chiesa di San Carlino alle Quattro Fontane

A masterpiece of Roman baroque, this tiny church was the first designed by Francesco Borromini. His complex design integrates convex and concave surfaces and a dome illuminated by hidden windows, cleverly transforming the small space. Completed in 1641, it stands at the intersection known as the Quattro Fontane, named after the fountains on its four corners, representing Fidelity, Strength, and the rivers Arno and Tiber. Borromini also designed the cloister, accessed through a passageway to the right of the altar.