Another church of historical interest is S. Saviour-in-the-Chora (country), now Kahriyeh Djamissi, and popularly known as the Mosaic Mosque, on account of the remarkable mosaics it still contains. It was clearly in existence previous to the year 413, as thereafter it stood within the line of the Wall of Anthemius, and could not then acquire the distinction of being situated “in the country.” Accordingly, it is a topographical landmark as regards the original extent of the city, only second in importance to Isa Kapou Mesdjidi, which we have seen indicates the line of the Constantinian Wall, the position of the first Golden Gate, and the situation of the Exokionion. Like every church with so long a life, S. Saviour-in-the-Chora has known many changes. It saw its best days in the fourteenth century, when it was thoroughly renovated by Theodore Metochites, and invested with the splendour which still glows upon its walls, and makes it one of the most beautiful of the old churches of the Byzantine world. Not less interesting historically is the Church of S. John the Baptist (Mir-Akhor Djamissi), situated in the quarter of Psamatia. It was founded about 463 by Studius, a Roman patrician who, like many other persons, when old Rome was tottering to its fall, fled from the West to the East, as when New Rome neared its end, some thousand years later, men escaped from the East to the West. The church was attached to a large monastery belonging to the order of the Acœmetæ or Sleepless Monks, who were so named because they celebrated Divine service in their churches day and night without intermission. According to the original constitution of the society the members of the order represented various nationalities, Greek, Latin, Syrian, and were divided into companies which passed from hand to hand, in unbroken succession, the censer of perpetual prayer and praise. They sought thus to make the worship of God’s saints on earth resemble that of the assembly gathered from all nations and peoples and tongues that serves Him without ceasing in heaven. Even thus of old Our ancestors, within the still domain Of vast cathedral or conventual church Their vigils kept; where tapers day and night On the dim altar burned continually, In token that the House was evermore Watching to God. Religious men were they; Nor would their reason, tutored to aspire Above this transitory world, allow That there should pass a moment of the year, When in their land, the Almighty’s service ceased.