The basic vocabulary, principles of word formation, and, to some extent, inflections and literary style of Russian have been also influenced by Church Slavonic, a developed and partly adopted form of the South Slavic Old Church Slavonic language used by the Russian Orthodox Church. Upon annexion of the Novgorod by Muscovy in 1478, Old-Novgorod dialect although vanished during 15–16 century, played a significant role in formation of the modern Russian language. The literary Russian has also a noticeable similarity with the modern Bulgarian language sharing about 60% vocabulary in fiction literature and up to 80% of the words used in journalistic genre while having notable differences in grammar.