Neither is identifiable as a place near Naples, which has led many scholars to think that "Nisidanum", or "of Nisida" was meant. There are no other records of a monastery there, although there were many around the Bay of Naples. Hadrian was twice offered the position of Archbishop of Canterbury by Pope Vitalian, but instead suggested Theodore of Tarsus, who then insisted that Hadrian accompany him.
It is not clear where "Nisidanum" refers to near Naples; this has caused scholars to think it might mean "of Nisida." There are no other records of a monastery there, though many monasteries existed around the Bay of Naples. Hadrian was twice offered the position of Archbishop of Canterbury by Pope Vitalian but instead suggested Theodore of Tarsus, who then insisted that Hadrian join him.