(also Carlo Maderna). Born 1556 in Capolago, Switzerland; died Jan. 30, 1629, in Rome. Italian architect.
Maderno began work in Rome in 1588. His works reflect the transition from early to high baroque; they contain the decorative splendor and developed spatial compositions that are characteristic of the high baroque style (Church of Santa Susanna, 1596-1603; Matteo di Giove Palace, 1606-16; Barberini Palace, from 1625—completed by L. Bernini and F. Borromini). From 1603, Maderno directed the construction of St. Peter’s Church; he made fundamental changes in Michelangelo’s plan, extending the central nave and constructing the vestibule and main facade.