The subject covers the history of Christianity in the wider area of ​​the Eastern Mediterranean, the Balkans, Central and Eastern Europe. Attention is paid mainly to the development of the Orthodox direction of Christianity in Byzantium, the description of its classical form and characteristics, and its subsequent spreading to neighboring geographical areas. The aim of the course is to acquaint students with the main features of the development of Eastern Christianity, especially those that still have an impact on current events. After completing the course, students will acquire the following knowledge, skills and abilities: they will be able to orientate themselves in the differences between Western and Eastern forms of Christianity, and will be able to understand the cultural differences and peculiarities of Southeast and Eastern Europe resulting from different historical, political and religious developments.