Completed in 1769, this Carmelite church dominates the southwest corner of handsome Piazza Busacca. Its pure white interior harbours stuccowork by master Giovanni Gianforma and Salvatore Alì, as well as a rare depiction of Carmelite nun and mystic Maria Maddalena de' Pazzi (Mary Magdalene de' Pazzi), born into a wealthy Florentine family in 1566 and reputedly good at predicting the future. It's one of several 18th-century paintings by Noto-born artist Costantino Carasi in the church.
The adjoining convent – built between 1775 and 1778 and spanning the western flank of the piazza – harbours a beautiful courtyard that's worth a peek.