Answer: dciv

AnswerCrossword Clue
DCIVCLI quadrupled
DCIVLast year of Gregory I's papacy
DCIVSeventh-century date
DCIVYear Pope Gregory I died
DCIVYear in the papacy of Gregory I
DCIV604.
DCIVRoman 604
DCIVEarly seventh-century year
DCIVYear St. Augustine of Canterbury died
DCIV604, in old Rome
DCIVNero's 604
DCIVPope Sabinian's coronation year