 Much of the decoration dates from the reign of Christina, Grand Duchess of Tuscany, who in 1627 commissioned the restoration of the Collegiata to Florentine artists, who provided large devotional altarpieces and sculptures.Artists include painters Matteo Rosselli, Francesco Curradi, Jacopo Vignali, Pietro Dandini, Bastiano Bitozzi, Jacopo Chiavistelli, and Alessandro Cominotti, and the sculptors Giovan Battista Stagi, Stagio Stagi and Ferdinando Tacca.The marble pulpit is instead from 1508, by Benti and Lorenzo Stagi, while the walls and the ceiling were painted by Luigi Ademollo in 1823-1825.