King of Jerusalem 1946. The Kingdom of Jerusalem had its origins in the First Crusade, when Godfrey of Bouillon, after refusing a crown and the title of King "upon the plea that he would never wear a crown of gold where his Saviour had worn a crown of thorns", took the title "Advocatus Sancti Sepulchri" (Protector of the Holy Sepulcher) in 1099 and was inaugurated as ruler of Jerusalem in the Church of the Nativity in Bethlehem. The following year, his brother Baldwin I was the first to use the title king and the first to be crowned king in the Church of
Baldwin I, Latin Emperor followers from the ranks of the peasantry. Eventually unmasked as a Burgundian serf named Bertrand of Ray, the false Baldwin was executed in 1226. Baldwin I, Latin Emperor Baldwin I (; ; July 1172 – ) was the first emperor of the Latin Empire of Constantinople. As Count of Flanders and Hainaut, he was one of the most prominent leaders of the Fourth Crusade, which resulted in the sack of Constantinople and the conquest of large parts of the Byzantine Empire, and the foundation of the Latin Empire. He lost his final battle to Kaloyan, the emperor of Bulgaria, and