Byzantine Constantine XI Emperor called on Western Europe to help, but his request was not met. Since the mutual extermination of the Orthodox Church and the Roman Catholic Church in 1054, Western Roman Catholics have tried to achieve rule on the East, a united effort is held. formerly in Lyon in 1274 and indeed some Paleologan emperors were admitted to the Latin Church. I don’t always spoil my grandkids oh wait yes I do shirt. Emperor John VIII Palaiologos tried to negotiate the Union with Pope Eugene IV, and a Council held in 1439 led to the publication in Florence, a Union treaty. In the following years, there was a great trend of resistance against the unification of boom in Constantinople and a great rift occurred in the people and Byzantine Church. The potential feud between the Greeks and Latins stemming from the siege of Constantinople 1204 by Latin crosses played an important role. Eventually the Alliance failed to cause much disappointment for Pope Nicholas V and the Roman Catholic Church.