There have been 3 popes named Julius and none of them retired. All of them died in office.
Yes, he did retire and became the pope.
Pope Julius I
Pope Pius III was the predecessor of Pope Julius II.
Pope Julius I died on 352-04-12.
Yes, Pope Julius II was a patron. Pope Julius II was Michelangelo Buonarotti patron. Pope Julius II wanted Michelangelo to paint the ceiling of the "Sistine Chaple". To be Continued........
Pope Julius I
Pope Julius II was pope in 1551.
Pope Julius was dead before the Reformation. The only possible connection is that Pope Julius II proposed the rebuilding of Saint Peter's Basilica. Pope Leo X who followed Julius as Pope, was accused of selling indulgences to support the project.
Pope Julius III, see the New Advent article below:
Pope Julius III was born on September 10, 1487.
Pope Julius III was born on September 10, 1487.
Pope Julius II was born on December 5, 1443.