Julius II’s successor, the Florentine Pope Leo X de Medici initiated the architectural competition for a new church in 1518 on the site of the old church of San Pantaleo. Designs were put forward by prominent architects such as Baldassare Peruzzi, Jacopo Sansovino, Antonio da Sangallo the Younger and the painter and architect, Raphael. The dominant initial ideas were for a centralised church arrangement.[1]