other predecessor successor death_date birth_place death_place feast_day image_size name birth_date term_start image article_title term_end birth_name type
julius mark liberius 12 april 352 rome , western roman empire rome , western roman empire 12 april 225px julius i ??? 6 february 337 iulius i.jpg pope julius i
 12 april 352 julius pope
pope julius i

pope julius i -lrb- died 12 april 352 -rrb- served as the bishop of rome from 6 february 337 to his death in 352 .
he was notable for asserting the authority of the pope over the arian eastern bishops , and also for setting the date of 25 december for celebrating the nativity .
