Bernini's Baldacchino (1624-33), for example, which rises at the cross-section of the Latin cross in St. Peter's basilica, is an enormous cast-bronze canopy for the main altar. It stands about 100 feet high reaching dramatically toward the latern at the top of the dome designed by Michelangelo. The Baldacchino's twisted columns decorated with spiraling parallel grooves and winding bronze vines were derived from Early Christian remains of the fourth-century church known as Old Saint Peter's.
Visible through the Baldacchino's columns on the back wall of the church is the gilded stone, bronze, and stucco encasement known as The Chair of Peter, or Cathedra Petri. It was made by Bernini between 1657 and 1666. It symbolized the direct descent of Christian authority from Peter to the current pope, a belief rejected by the Protestant Reformation. The chair is carried by four theologians and lifted further by a surge of gilded clouds moving upward toward an explosion of angels, putti, and gilt-bronze rays of light bursting forth from a stained-glass panel depicting a dove (representing the Holy Spirit).