Which answer matches this clue: the Baroque church in Rome where Andrea Pozzo painted a trompe-l'Å“il dome on a flat ceiling?

• A Santa Maria della Vittoria
• B San Carlo alle Quattro Fontane
• C Sant'Ignazio ✓
• D Santa Maria in Trastevere

Andrea Pozzo's dome at Sant'Ignazio is painted on a flat canvas ceiling; visitors standing at the marked spot see a perfect illusion of depth.