Pope Urban VIII, who occupied the Papacy from 1623 to 1644, became the most influential patron of the Baroque style. After the death of Carlo Maderno in 1629, Urban named the architect and sculptor Gian Lorenzo Bernini as the chief Papal architect. Bernini created not only Baroque buildings, but also Baroque interiors, squares and fountains, transforming the center of Rome into an enormous theater. Bernini rebuilt the Church of Santa Bibiana and the Church of San Sebastiano al Palatino on the Palatine Hill into Baroque landmarks, planned the Fontana del Tritone in the Piazza Barberini, and created the soaring baldacchino as the centerpiece St Peter's Basilica.