1237 - The Retirement of Guðmundur Arason

• To: Archbishop Sigurd Eindridesson From: Pope Gregory IX - Re: Guðmundur Arason's Suspension - May 11, 1237
• To: Archbishop Sigurd Eindridesson From: Pope Gregory IX - Re: Guðmundur Arason's Retirement - May 11, 1237