Church poetry entered upon a new stage, characterized by an increase in artistic finish and a falling off in poetical vigour, with the composition of the _Canones_, songs artfully built up out of eight or nine lyrics, all differently constructed. Andreas, archbishop of Crete (c. 650-720), is regarded as the inventor of this new class of song. His chief work, "the great Canon," comprises no less than 250 strophes. The most celebrated writers of _Canones_ are John of Damascus and Cosmas of Jerusalem, both of whom flourished in the first half of the 8th century. The "vulgar" simplicity of Romanos was regarded by them as an obsolete method; they again resorted to the classical style of Gregory of Nazianzus, and John of Damascus even took a special delight in the most elaborate tricks of expression. In spite of this, or perhaps on that very account, both he and Cosmas were much admired in later times, were much read, and--as was very necessary--much commentated. Later, sacred poetry was more particularly cultivated in the monastery of the Studium at Constantinople by the abbot Theodorus and others. Again, in the 9th century, Joseph, "the hymn-writer," excelled as a writer of songs, and, finally, John Mauropus (11th century), bishop of Euchaita, John Zonaras (12th century), and Nicephorus Blemmydes (13th century), were also distinguished as authors of sacred poems, i.e. _Canones_. The Basilian Abbey of Grotta Ferrata near Rome, founded in 1004, and still existing, was also a nursery of religious poetry. As regards the rhythmic church poetry, it may now be regarded as certain that its origin was in the East. Old Hebrew and Syrian models mainly stimulated it, and Romanos (q.v.) was especially influenced by the metrical homilies of the great Syrian father Ephraem (d. about 373). Profane literature; historical accounts.