Octoechos (Octoekhos) – a two-volume Eastern Christian liturgical book containing the Common of the season. One volume is an abridgment of the other and is known simply as the Little Octoechos, or simply the Octoechos, while the larger and more extensive book has come to be called the Great Octoechos, or Parakletike. The Little Octoechos contains eight Sunday Offices corresponding to each of the eight tones, hence the name of the book. In each tone, or mode, there are seven sets of services, which correspond to each day of the week, so that when the eight mode is completed, the first is begun again. (Day, Peter. The Liturgical Dictionary of Eastern Christianity. Wellwood, 1993. P. 210-211). The book forms part of the the collection of old prints and special collections of UCU Library. The book contains marginal notes in black ink. There are handwritten text fragments in black ink pasted over damaged or lost printed text. The binding is missing. There is a shortage in the book: missing title leaf, the beginning 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, 1981, Vol. 1 : (1574-1700). – P. 65. – № 323. 2°. [3], 351 leaves. Layout: printed in 1 and 2 columns of 41 lines; printing in 2 colors (black and red). Script: 10 lines - 60, 84, 25 mm Decoration: Engraving (forta, coat of arms of the Lviv Dormition Brotherhood (reverse of title), printing stamp of the Brotherhood (leaves 351). 11 illustrations from 5 boards, headpieces, tailpieces, initial capitals, rubric. Molded decorations. Printer: M. Slozka (by order of the Brotherhood). Engravers: Ilia, Heorhii, WS, LT.