Pope Francis (pape Francois; Papst Franziskus) celebrates the Holy Thursday Mass at the Altar of the Chair in St. Peter's Basilica in St. Peter's Basilica; at the Vatican; April 9; 2020.- Monument Cathedra Petri (or throne of St. Peter ) in the apse of Saint Peter's basilica (Chaire ou Tr鬾e de Saint Pierre dans l'abside de la basilique Saint-Pierre.)by Gian Lorenzo Bernini (1657-1666)Bernini created a large bronze throne in which a chair which was often claimed to have been used by the apostle St Peter; was housed; raised high on four looping supports held effortlessly by massive bronze statues of four Doctors of the Church; Saints Ambrose and Augustine representing the Latin Church and Athanasius and John Chrysostom; the Greek Church. Behind and above the Cathedra; a blaze of light comes in through a window of yellow alabaster; illuminating; at its center; the Dove of the Holy Spirit.(Saint Peter's basilica; basilique Saint-Pierre; Petersdom)Vatican 2020