<Li> On the decorative pilasters of the piers of the nave are medallions with relief depicting 56 of the first popes . </Li> <Li> In niches between the pilasters of the nave are statues depicting 39 founders of religious orders . </Li> <Li> Set against the north east pier of the dome is a statue of Saint Peter Enthroned, sometimes attributed to late 13th - century sculptor Arnolfo di Cambio, with some scholars dating it to the 5th century . One foot of the statue is largely worn away by pilgrims kissing it for centuries . </Li> <Li> The sunken Confessio leading to the Vatican Grottoes (see above) contained a large kneeling statue by Canova of Pope Pius VI, who was captured and mistreated by Napoleon Bonaparte's army . This has now been moved to the back (eastern) end of the grottoes . </Li>

Which of the following architects did not work on st. peter’s basilica