After the fall of Rome, Western Europe entered the Middle Ages from 500-1500 AD. During this period, the Catholic Church became the most powerful institution as there was no single government. The Islamic world also grew in power and size through military conquests. In response, the Catholic Church authorized the Crusades in 1095 in an attempt to retake the Holy Land. Life in the Middle Ages was organized around a feudal system and ideals of chivalry, though it was devastated by the Black Death plague in the late 1300s. Literature also developed significantly during this time, with Geoffrey Chaucer's Canterbury Tales being one of the most famous works.