John of Ibelin (aka John of Jaffa) Le Livre des Assises
John of Ibelin, a powerful magnate and accomplished lawyer in the Latin East, wrote the Livre des Assises in Old French sometime around 1264. The Livre describes the laws and procedures of the high court of the Latin kingdom of Jerusalem and Cyprus as John remembers it. At about 160,000 words, the Livre is the largest of the vernacular legal writings from the Latin East and it quickly became popular in Cyprus, where local redactors expanded and edited the text well into the fourteenth century. In 1369 the text was formally adopted as the official law of the kingdom of Cyprus.