Middle Byzantine, Constantinople(?), early 11th C BZ.1979.31 The full page portrait of the evangelist Mark is a leaf from a lectionary. The book contained a dedication, indicating that it was presented by Empress Catherine Comnene to the Holy Trinity monastery of Chalki in March of 1063.
aperture=f3.2 focal length: 60.0 mm exposure 1/100 sec ISO: 2000