A Byzantine timeline created by Elfwine. You can read it here.

Let's quote Elfwine himself:

“The POD is in 1166, when a son is born to Manuel Comnenus. Despite this, nothing much changes until 1176, when Manuel in an uncharacteristic moment of caution, accepts the Seljuk Sultan's offer of part of Turkish Anatolia in exchange for a ten year truce between the Empire and the Sultanate. Chapter 1 begins seven years into this truce, with the ascension of Alexius II.”

Medieval Timelines