Euchologion (Trebnik) – the principal service book, whose composition dates from at least the 8th century. It is so called because it was first written on a long parchment wound around a stick and was designed for the use of the priest and deacon, since it contained the fixed parts of the Liturgy. It also contains details of the other sacraments, together with various prayers and blessings used on occasion. (Day, Peter. The Liturgical Dictionary of Eastern Christianity.Wellwood, 1993. P. 94). The book forms part of the the collection of old prints and special collections of UCU Library. The binding is new (cardboard base and artificial leather; Bohdan Semko, 10.01.1972). At 1895 the book belonged to the Fylyp kostiuk from the village Baniunyn (Lviv district, Lviv region). The book contains numerous marginal notes in black ink, in grey pencil. In some places the text is crossed out, there are pasted paragraphs of handwritten text on top of printed or lost ones. There is a shortage in the book: missing title, begining and the ending leaves. Title supplied by cataloger. Title cataloged from existing description. Zapasko I͡A., Isai͡evych I͡A. Pami͡atky knyz͡hkovoho mystet͡stva : kataloh starodrukiv, vydanykh na Ukraїni. – Lʹviv : Vyshcha Shkola, 1984, Vol. 2, pt. 1 : (1701-1764). – P. 33. – № 955. 2°; [16], 429, [13] leaves Lines - 19, 26. Pages in linear frames. Layout: printed 2 colors (black and red). Print run: [1200 copies]. Script: 10 lines - 80, 59 mm. Decoration: Engraving (forta, Dormition (reverse of title), Saint Gregory the Dialogist (Pope Gregory I) (leaf 317 reverce), plot headpieces, tailpieces (from the ancient boards), initial capitals (from the cliche of the Zabludivskyi Psalter and the Ostrog Bible). Molded decorations. Engravers: Vasyl' Ushakevych, NZ (Nykodym Zubrytskyi) (with the date 1697), Ivan Hlynskyi (with the date 1667).