Innocent III: the beast’s 666 years, almost 600 completed
Author of the linked interpretation
Revelation 13:1–18; complete chapter · Revelation 13: the two beasts and the number · Source evidence ↗
Person
Innocent III
1160/61–1216
Pope (1198–1216) whose crusade letter Quia maior (1213) said the 666 years of the beast were nearly complete.