8 5 ▁– ▁Pope ▁Gregory ▁VII ▁▁ 1 0 7 1 ▁– ▁Battle ▁of ▁Man zik ert ▁▁ 1 0 7 7 ▁– ▁Henry ▁IV ' s ▁Walk ▁to ▁Can ossa ▁▁ 1 0 8 6 ▁– ▁Dom es day ▁Book ▁▁ 1 0 8 6 ▁– ▁Battle ▁of ▁az - Z alla q ah ▁▁ 1 0 8 8 ▁– ▁University ▁of ▁Bolog na ▁founded ▁▁ 1 0 9 1 ▁– ▁Battle ▁of ▁Lev oun ion ▁▁ 1 0 9 6 – 1 0 9 9 ▁– ▁First ▁Cr us ade ▁▁ 1 1 2 3 ▁– ▁First ▁Later an ▁Council ▁▁ 1 1 3 9 ▁– ▁Second ▁Later an ▁Council ▁▁ 1 1 4 5 – 1 1 4 9 ▁– ▁Second ▁Cr us ade ▁▁ 1 1 4 7 ▁– ▁Wend ish ▁Cr us ade ▁▁ ▁– ▁University ▁of ▁Paris ▁founded ▁▁ 1 1 5 5 – 1 1 9 0 ▁– ▁Frederick ▁I ▁Bar bar ossa ▁▁ 1 1 5 8 ▁– ▁foundation ▁of ▁the ▁Han se atic ▁League ▁▁ 1 1 6 7 ▁– ▁University ▁of ▁Oxford ▁founded ▁▁ 1 1 8 5 ▁– ▁re est ab lish ment ▁of ▁the ▁Bulgar ian ▁Empire ▁▁ 1 1 8 9 – 1 1 9 2 ▁– ▁Third ▁Cr us ade ▁▁ 1 2 0 0 – 1 2 0 4 ▁– ▁Four th ▁Cr us ade ▁▁ 1 2 0 5 ▁– ▁battle ▁of ▁Ad rian ople ▁▁ 1 2 0 9 ▁– ▁University ▁of ▁Cambridge ▁founded ▁▁ 1