 With the election of the Sienese Enea Silvio Piccolomini of the prominent Piccolomini noble family as Pope Pius II in 1458, the nobles who had been expelled due to association with the Noveschi party were allowed to return to the city.In 1472 the Siena magistrates founded a "mount of piety", the Banca Monte dei Paschi di Siena, which would survive into the 21st century as "the world's oldest bank".The Noveschi returned to the city under Pandolfo Petrucci in 1487.