Who would have called Frederick II "an Antichrist"?
His political allies
The Kings he deposed
The Pope
Ordinary citizens
Answer
Frederick II was a Holy Roman Emperor, who was excommunicated by Pope Gregory IX in 1227 for refusing to participate in a crusade. The Pope then called Frederick "an Antichrist", and this label was used by other opponents of Frederick as well.
The Mighty Monarch: Test Your Knowledge on Frederick II, Holy Roman Emperor