<P> But in the High Middle Ages , under pressure from the Seljuk Empire , it suffered serious setbacks and fell into decline . After the Battle of Manzikert ( 1071 ) it lost control of Anatolia , and while the Komnenos dynasty restored a degree of stability in the 12th century with help from the First Crusade , the empire was captured and partitioned by the Crusaders themselves in the Fourth Crusade in 1204 . </P>
<P> But in the High Middle Ages , under pressure from the Seljuk Empire , it suffered serious setbacks and fell into decline . After the Battle of Manzikert ( 1071 ) it lost control of Anatolia , and while the Komnenos dynasty restored a degree of stability in the 12th century with help from the First Crusade , the empire was captured and partitioned by the Crusaders themselves in the Fourth Crusade in 1204 . </P>
when did the byzantine empire start to decline
when did the byzantine empire start to decline
1071
1071