Nikolai Diletsky

Nikolay Diletsky (Ukrainian: Микола Дилецький, Mykola Dyletsky, Russian: Николай Павлович Дилецкий, Nikolay Pavlovich Diletsky, Nikolai Diletskii, Polish: Mikołaj Dilecki, also Mikolaj Dylecki, Nikolai Dilezki, etc.) (c. 1630, Kiev – after 1680, Moscow) was a theorist and composer of Ukrainian nationality, active in Russia. He was widely influential in late 17th century Russia with his treatise on composition, A Musical Grammar, of which the earliest surviving version dates from 1677.