Irmologion (Heirmologion) – a liturgical book that contains the text of words and music or of words alone of the irmoi (irmos), or theme songs of the Canons, as well as the service sung in honor of our Lord, the Theotokos, and other major saints. This collection probably owes its origin to a time when, since the Canons were not sung in their entirety, most of the troparia eothina were simply read, and the irmos, or model, of each ode was sung. Because the cantors knew the tune of the irmosvery well, they did not need to have access to the great volumes that contained the Canon in its entirety. (Day, Peter. The Liturgical Dictionary of Eastern Christianity.Wellwood, 1993. P. 129-130) The book forms part of the the collection of old prints and special collections of UCU Library. Belonged to the Church of the Archangel Michael in 1744 (localition unknown). The binding is original (cardboard base, embossed leather). The book contains marginal notes in black ink, in grey, blue and red pencils. The Church Slavonic alphabet is written by hand on the title page. Zapasko I͡A., Isai͡evych I͡A. Pami͡atky knyz͡hkovoho mystet͡stva : kataloh starodrukiv, vydanykh na Ukraїni. – Lʹviv : Vyshcha Shkola, 1984, Vol. 2, pt. 1 : (1701-1764). – P. 24. – № 847. 2°. [24], [209], [13] leaves Lines - 38. Pages in linear frames. Print run: [800 copies]. Layout: printed in 1 columns in 2 colors (black and red). Script: 10 lines - 60, 62 mm. Decoration: Engraving (forta, Dormition (reverse of title), John of Damascus (reverse of 24 leaf), Mother of God with the Child (leaf 137), 12 small illustrations (30x40 mm), ornamental and plot headpieces, tailpieces, initial capitals, rubric. Molded decorations. Engravers: Nykodym Zybrytskyi, Dyonysii (Sinkevych). Printer: V. Stavnytskyi