Jean de Louvres was the principal architect of the papal chapels in Avignon constructed in the mid-fourteenth century. He designed an innovative staircase, wide and well lit, incorporating several landings. One of these landings had the special purpose for Pope Clement VI

Pope Clement VI

Pope Clement VI , bornPierre Roger, the fourth of the Avignon Popes, was pope from May 1342 until his death in December of 1352...

 to overlook the courtyard below and offer indulgences to the faithful on All Saints Day.

Sources

• Andrew Tomasello, Music and Ritual at Papal Avignon 1309-1403, page 18