They set up what are known as Crusader Kingdoms. And you can see some of them right over here in this bluish color. So once again, you had this East-West Schism, and the Crusades are further expanding the division between East and West. 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.