 A tenth century poem by Constantine the Rodian, or Constantine of Rhodes, preserved in a fifteenth century manuscript and contains an ekphrasis and description of the church.The domes appear to have been radically altered between 944 and 985 by the addition of windowed drums beneath all five domes and by raising the central dome higher than the others.The 12th century writer Nicholas Mesarites also recorded a description of the church, of which only fragments survive.