Answer: leoiv

AnswerCrossword Clue
LEOIVBenedict III's predecessor
LEOIVPope before Benedict III
LEOIVMid-ninth century pope
LEOIVPope after Sergius II
LEOIVPope during the Battle of Ostia
LEOIVNinth-century pope
LEOIVPope who saved Rome from the Saracens.
LEOIVPope in 928
LEOIVSainted ninth-century pope
LEOIVNinth-century Vatican head
LEOIVVatican head: 847-855
LEOIVPope 847-855
LEOIVA Byzantine emperor