As a learned prose-author, Cosmas wrote commentaries, or
scholia, on the poems of
Gregory of Nazianzus. He is regarded with great admiration as a poet. Cosmas and John of Damascus are considered to be the best representatives of the later Greek classical
hymnography, the most characteristic examples of which are the artistic liturgical chants known as "
canons". They worked together on developing the
Octoechos. He composed the solemn canons for
Matins of
Lazarus Saturday,
Palm Sunday, the Triodes (canons with only three
Canticles) which are chanted during
Holy Week, the first canon of the
Nativity (based on a Nativity sermon by
Gregory the Theologian), and is known for his finest work, "
Canon for Christmas Day". His most well-known composition is "More honourable than the cherubim…" (which is included in the
Axion Estin), sung regularly at Matins, the
Divine Liturgy and other services. The hymns of Cosmas were originally intended for the
Divine Services of the
Church of Jerusalem, but through the influence of
Constantinople their use became universal in the Orthodox Church. It is not certain, however, that all the hymns ascribed to Cosmas in the liturgical books were really his compositions, especially as his teacher of the same name was also a hymn writer. The Eastern Orthodox Church observes his feast on October 12 (
Julian Calendar, it is October 25 of the
Gregorian Calendar) and in Greek Church on October 14 (Julian, it is October 27). == See also ==