The Orthodox Church by Timothy (Kallistos) Ware — The most widely used English-language introduction to the history and theology of the Church.
The breaking point of 1054 and the Fall of Constantinople (1453). Istoria Biserici Ortodoxe
The "Rum Millet" system under Ottoman occupation. The Orthodox Church by Timothy (Kallistos) Ware —
The Orthodox Church in the Byzantine Empire by J.M. Hussey — Excellent for understanding the medieval development of the Church. Istoria Biserici Ortodoxe