Answer: popeleo

AnswerCrossword Clue
POPELEOVatican figure instrumental in saving Rome from Attila
POPELEOPontiff of 1878.
POPELEOOne of 13 religious leaders
POPELEOAny of 13 pontiffs
POPELEOWhat 13 pontiffs were called
POPELEOHe dissuaded Attila from invading Rome