We can talk only approximately about the date and authorship of chants represented on the disk. Some Greek musicologists believe that Eastern Orthodox liturgical music originates from the singing of levites in ancient Israel. Making its way with Christianity and changing in the light of national features, Eastern Orthodox (Byzantine) church choir music has begun church-singing culture of Georgia, Bulgaria, and Russ. No doubt, "The First Ode of the Easter Canon" is of the most unique and rare recording represented on this disk. The Church attributes the Easter Canon's authorship to Saint John the Damascene, who lived in the 8th century. He established church "oktoechos" (eight tones) - common base of liturgical music, consisting of eight tonal-melodic systems. Such names as John Glyka, St John Koukousel, John Klad and others marked the period of "Kalophonia" ("beautiful singing") in the 12-14th centuries. The works of Theodore of Phokea (the 18th century) are the best samples of kalophonia-music. In Georgian church music there are two styles: Cartalin-Cahetian and Himertin-Gury. In certain theological sense the Orthodox Church has developed three-voice singing. So, due to the special motion, native Georgian polyphony and polyphonic thinking have developed. The base of Russian Orthodox music - Znamenny tune was usually called "Angel-like". It is mainly because of the power of prayer and spiritual purity of the echoi (tones) melodies, crystallized in standing of Holy Rus before the God.**** The ensemble of medieval church choir music "Sreteniye" ("Candlemas") was founded in 1990 in Kharkov, by graduates of Kharkov institute of beaux arts. Well-known Greek protopsalt L. Angelopoulos gave invaluable help to the ensemble Sretenye. Not only he supplemented the repertoire of the choir with a number of very rare ancient songs, but also what is the most important he shared his knowledge of Byzantine singing