Ad apostolicae dignitatis apicem

Ad apostolicae dignitatis apicem was an apostolic letter issued against Holy Roman Emperor Frederick II by Pope Innocent IV (1243–54), during the Council of Lyon, 17 July 1245, the third year of his pontificate. The letter sets forth that Innocent, desiring to have peace restored to those parts which were then distracted by dissensions, sent for that purpose three legates to Frederick as the chief author of those evils, pointed out the way to peace, and promised that he would do his own part to restore it.

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