An interesting day...I couldn't pass up these two tidbits I found!
October 11, 1216 - King John (Richard the Lionheart's younger brother) lost his crown and jewels whilst crossing 'The Wash'. This incident is portrayed in Elizabeth Chadwick's wonderful novel The Marsh King's Daughter which I read and reviewed.
October 11, 1521 - Pope Leo X conferred the title of 'Defender of the Faith' on King Henry VIII for his book supporting Catholic principles against Luther's attacks. In later years, Henry hoped that being on good terms with the Pope would help him get his divorce from Catherine of Aragon....it didn't.