Istoria Biserici Ortodoxe -

The Orthodox Church by Timothy (Kallistos) Ware — The most widely used English-language introduction to the history and theology of the Church.

Cultural and theological drifts between Rome and Constantinople. Istoria Biserici Ortodoxe

As the Byzantine Empire fell, Russia emerged as a powerhouse of Orthodoxy. Moscow began to view itself as the "Third Rome," inheriting the mantle of the protector of the faith. The Rise of National Churches The Orthodox Church by Timothy (Kallistos) Ware —

Istoria Bisericii Ortodoxe Române by Mircea Păcurariu — The definitive source if you are focusing specifically on the Romanian Orthodox Church context. Istoria Biserici Ortodoxe