The Great Schism and Byzantine–Latin Ecclesiastical Relations (1000–1204)

1. Norman advance strains Byzantine–papal relations

   Jan 1, 1000Labels: Normans, Southern Italy

   • Britannica
   • Britannica

2. Patriarch Michael I closes Latin churches

   Jan 1, 1053Labels: Michael I, Latin churches

   • Britannica
   • Britannica

3. Papal legation arrives in Constantinople

   Apr 1, 1054Labels: Pope Leo, Cardinal Humbert

   • Britannica
   • Britannica

4. Humbert deposits excommunication bull in Hagia Sophia

   Jul 16, 1054Labels: Cardinal Humbert, Hagia Sophia

   • Britannica
   • Britannica

5. Constantinople synod excommunicates Humbert and legates

   Jul 20, 1054Labels: Constantinople Synod, Humbert

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   • Britannica

6. Council of Blachernae addresses imperial–ecclesiastical tensions

   Dec 1, 1094Labels: Council of, Alexios I

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7. Council of Piacenza hears Alexios I’s appeal

   Mar 1, 1095Labels: Council of, Alexios I

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8. Council of Clermont launches the First Crusade

   Nov 18, 1095Labels: Council of, Pope Urban

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   • Britannica

9. Council of Bari debates Latin–Greek doctrinal issues

   Oct 1, 1098Labels: Council of, Pope Urban

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10. Treaty of Devol attempts to subordinate Antioch to Byzantium

    Sep 1, 1108Labels: Treaty of, Principality of

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11. Crusaders seize Constantinople and install Latin rule

    Apr 12, 1204Labels: Fourth Crusade, Constantinople

    • Britannica
    • Britannica

12. Thomas Morosini elected first Latin patriarch of Constantinople

    May 1, 1204Labels: Thomas Morosini, Latin Patriarch

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13. Baldwin of Flanders chosen as Latin emperor

    May 9, 1204Labels: Baldwin of, Latin Empire

    • Britannica
    • Britannica

14. Partition of Byzantine lands formalized among crusaders

    Oct 1, 1204Labels: Partitio, Venice

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    • Britannica