Francesco Borromini

San Carlo alle Quattro Fontane in Rome is known for Borromini's complex oval geometry and rippling facade. It is a key work of Italian Baroque architecture.

Borromini favored tight geometric experimentation, complex curves, and structural invention, while Bernini often worked with grand theatrical effects in sculpture and architecture. Their rivalry is a major theme in 17th-century Roman Baroque art.

Sant'Ivo alla Sapienza in Rome has Borromini's famous corkscrew-like lantern. The church was built for the University of Rome and is one of his most inventive designs.

Yes. Borromini worked early in his career under Carlo Maderno on projects connected with St. Peter's Basilica. He later developed an independent style in Roman churches and palaces.