Theotokion

[citation needed] The inclusion of Theotokia in every service is sometimes accredited to Peter the Fuller, Patriarch of Antioch (471 - 488), a non-Chalcedonian and ardent opponent of Nestorianism.

The theotokion that occurs at the end of "Lord, I Have Cried" at Vespers on Saturdays is called a Dogmaticon,[3] because its text deals with the mystery of the Incarnation of Christ.

The Dogmaticon is often chanted in a solemn manner, and while the choir is singing it the Deacon or Priest will cense the icon of the Theotokos on the Iconostasis.

This is solemnly chanted on the Fifth Saturday of Great Lent, and many other times during the year as both public and private devotions.

Theotokarion (Ancient Greek: θεοτοκάριον, Russian: богородичны праздников, Serbian: Богородичник/Bogorodičnik, Latin: Theotocium) is a book or collection of Eastern Orthodox hymns to Mary (theotokion).