And that really becomes significant in 1204 when the Crusaders themselves sack Constantinople, take Constantinople from the Byzantines. So that's in some ways the point of no return. The Byzantines are eventually able to take Constantinople back, but this is really the beginning of the end for the Byzantine Empire. Now even though the High Middle Ages are known for this tension between East and West, the Great Schism, even though it's known for the Crusades, most of which were fairly unsuccessful despite being very, very, very bloody for the Crusaders, the High Middle Ages were considered a high point for the Middle Ages. Farming technology coupled with better weather actually significantly increased agricultural productivity at this time. But then, roughly in the year 1300, historians consider ourselves moving into the Late Middle Ages. So you can see here in this map, by the Late Middle Ages, Europe is starting to resemble the Europe that we know in later periods once we get into the Renaissance and the Age of Exploration.