-The twisted columns of the Baldachin (Baldaquin) by Gian Lorenzo Bernini (1598-1680) Bernini's first work at St. Peter's was to design the baldacchino; a pavilion-like structure 28.74 metres tall and claimed to be the largest piece of bronze in the world; which stands beneath the dome and above the altar.- Behind: Monument Cathedra Petri (or 'throne of St. Peter') (trone ou chair de Saint Pierre) in the apse of Saint Peter's basilica by Gian Lorenzo Bernini (1657-1666)- Top : Detail of the Dome -(Saint Peter's basilica; basilique Saint-Pierre; Petersdom)Vatican 2019