first bulgarian empire - Cultural development
Missionaries from Constantinople, Cyril and Methodius, devised the Glagolitic alphabet, which was adopted in the Bulgarian Empire around 886. The alphabet and the Old Bulgarian language gave rise to a rich literary and cultural activity centered around the Preslav and Ohrid Schools, established by order of Boris I in 886. In the beginning of 10th century AD, a new alphabet — the Cyrillic alphabet - was developed on the basis of Greek and Glagolitic cursive at the Preslav Literary School. According to an alternative theory, the alphabet was devised at the Ohrid Literary School by Saint Clement of Ohrid, a Bulgarian scholar and disciple of Cyril and Methodius. A pious monk and hermit St. Ivan of Rila (Ivan Rilski, 876-946), became the patron saint of Bulgaria. After 893 Preslav
became truly new and in many aspects authentic Bulgarian capital.