The Anthologion is a sort of breviary or mass-book, containing the daily 'divine offices' addressed to Jesus Christ, the Virgin Mary, and the principal saints. Other common offices include those of prophets, apostles, martyrs, pontiffs, and confessors, according to the Greek rite.
It is called άνθολόγιον, q.d. florilegium, or a collection of flowers.
This article incorporates text from a publication now in the public domain: Chambers, Ephraim, ed. (1728). "article name needed". Cyclopædia, or an Universal Dictionary of Arts and Sciences (first ed.). James and John Knapton, et al.