The Oktoechos: The Eight Resurrection Tones

The Octoechos or "Eight Tones" is am Eastern Orthodox (Byzantine) liturgical text, first arranged by St. John of Damascus at the Mar Saba monastery (Palestine) in the eighth century. This book contains a rotation of eight tones and Services with specific hymns that are chanted from the end of the Pentecostarion season to the beginning of Great Lent.