The Byzantine empire took on Christianity because of their different opinions in worship icons. This resulted in importance of church in state & don't forget that the cross is different in the orthodox Christianity religion than in the roman catholic religion.
Byzantine missionaries preached Orthodox Christianity outside their empire.
The two most important Byzantine missionaries were Saint Cyril and Saint Methodius. They were two brothers who were missionaries among the Slavs. They preached in Great Moravia (a West Slavic state, which at the time was the most powerful state in central Europe) and Pannonia (eastern Austria and western Hungary) in the 9th century. They greatly influenced all Slavs and were given the title of "Apostles to the Slavs". They created the Glagolitic alphabet, the first Slavic alphabet, and developed Old Church Slavonic, the first Slavic literary language which standardised the Slavonic language and which they used to translate The Bible and other Greek ecclesiastical texts. They created the foundations for the Christianisation of the Slavic peoples. In the Orthodox Church they are saints and have the title of "equal-to-apostles."
Monks and nuns spread Byzantine influence through their missionary work.
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orthodox Christianity
Christianity
Christianity
Islam became a rival of Christianity in the Byzantine Empire.
Orthodox Christianity.
It was Orthodox Christianity.
Islam became the strongest rival of Christianity in the Byzantine Empire.
The form of Christianity based on Greek heritage practiced in the Byzantine Empire is Eastern Orthodox.
icons
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It changed it by changing it.
Orthodox Christianity