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In page Theotokos:

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The iconographic tradition is well developed by the early medieval period. The tradition of Luke the Evangelist being the first to have painted Mary is established by the 8th century.[4] An early icon of the Virgin as queen is in the church of Santa Maria in Trastevere in Rome, datable to 705-707 by the kneeling figure of Pope John VII, a notable promoter of the cult of the Virgin, to whom the infant Christ reaches his hand. The earliest surviving image in a Western illuminated manuscript of the Madonna and Child comes from the Book of Kells of about 800 (there is a similar carved image on the lid of St Cuthbert's coffin of 698). The oldest Russian icons were imports from Byzantium, beginning in the 11th century.