Geoffrey of Donjon Open this page in a new tab

Geoffroy de Donjon (died 1202 in Acre), also known as or Geoffroy de Duisson, was the 11th Grand Master of the Knights Hospitaller serving from 1193 through his death in 1202 (wikipedia and Theresa M. Vann in Murray, 2006:604 ). A letter written by him to King Sancho VII of Navarre describes and dates the earthquake. Mayer (1972:300) notes that the letter is not dated but is dateable from internal evidence because it reports the great earthquake which shook the East on May 20, 1202, and expressly mentions this date. Mayer (1972:300-301) assumes that it took some time to assemble reliable news from various parts of the country and safely dates its composition to June 1202 CE.