With the exception of Hagia Sophia, no Byzantine monument in the modern city of Istanbul can rival the former church of the monastery of the chora (Kariye Camii) in either the lavishness and splendor of its interior decoration, the upkeep of its grounds and garden, or, for that matter, the number of tourists from all over the world. Theodore Metochites, minister and subsequently prime minister of the Byzantine Empire, during a short period of cultural...