Лекция 1. Происхождение и разновидности уставов. Богослужебные круги

This lecture, delivered by reader Vitaliy Ivanovich Moskvychev, explores the origin and varieties of service statutes and the liturgical circles used in the Old Believer tradition. It discusses the historical development of key service statutes such as the Jerusalem, Studio, and Great Church statutes, their arrival in Russia, and their contemporary application within the church. The talk also outlines the three main liturgical circles and provides guidance for further study of related texts.