Around 630-635 in the steppes north of Black Sea, Khan Kubrat united Bulgar tribes. After his death, newly established nomadic confederation was attacked by Khazars. While Bayan, Kubrat's oldest son and successor subjugated to Khazars, his younger brother Asparuh retreated westwards with his people. In 680, he established his rule over shores of Lower Danube. Since then, a new pagan culture, an alloy of Bulgar, Slavic and Thracian traditions developed. In 865, Bulgarian ruler Boris baptized and thus started the Christianisation of Bulgaria. In 1018 after decades of struggle, First Bulgarian Empire was finally conquered and its territory incorporated into Byzantine Empire. In the Pagan period, Bulgarian rulers used Greek language and script to record their deeds. Nowadays over a hundred of those inscriptions are recovered and studied. Around 886, a newly devised script, the Glagolitic alphabet was adopted in Bulgaria and Old Bulgarian (Old Church Slavonic) replaced Greek language a...