Assertion: caliphate's capital | /r/HasProperty | preslav
Facets:
Source sentences:
text: Through the efforts of missionaries Saint Cyril and Saint Methodius, the Bulgarian Glagolitic and Cyrillic alphabets were developed in the capital Preslav and a vernacular dialect, now known as Old Bulgarian or Old Church Slavonic, was established as the language of books and liturgy among Orthodox Christian Slavs.