Is a plane surface in its higher part, where is the Circus, but from the end of this it descends steeply to the sea. It contains the Circus Maximus; the house of Pulcheria Augusta; the new harbour; a semicircular portico, called by the Greeks Sigma; the Tribunal of the Forum of Constantine; 7 streets; 94 houses; 5 large porticoes; 11 private baths; 9 private cornmills. It had 1 curator; 1 vernaculus; it had also 21 collegiati; and 5 street wardens. REGION IV. From the Golden Milliarium is prolonged, with hills rising to right and left in a valley leading to an open space. It contains the golden Milliarium; the Augusteum; the Basilica; the Nymphaeum; the Portico of Fanio; a marble ship--the monument of a naval victory--the church or martyrium of S. Mennas; the Stadium; the Scala Timasii; 32 streets; 375 houses; 4 large porticoes; 7 private baths; 5 private cornmills; 7 terraces of steps. It had 1 curator; 1 vernaculus; 45 collegiati; 5 street wardens. _Augusteum._--Thus Region I., occupying the land between the Acropolis wall and the sea, was partly reserved for palaces; Region II. coincided with the Acropolis, and had its south end devoted to the Forum Augusteum and the Christian Basilicas of S. Sophia (“the Great Church”) and St. Irene (“the Old Church.”). It will be observed that in the _Notitia_ the Augusteum is given to Region IV., to which it does indeed adjoin; Mordtmann[18] considers that the Augusteum, like the buildings round it, must have belonged to Region II., but suggests that there may have been a continuation of the open space farther to the west in Region IV., and some such space as this certainly seems required by several of the references. Gyllius first made the identification of the Augusteum with the present open space on the south of S. Sophia; in this he was followed by Labarte, and Mordtmann concurs. Paspates in making the Augusteum occupy the ground along the east side of the Hippodrome stands alone against, as it seems to us, all evidence. For example, he is compelled to shift the inscribed pedestal of the statue of the Empress Eudoxia, which we cannot but believe was found in its original position (see Mordtmann, p. 64, and Paspates, p. 105, and below, p. 13). The _Mese_ moreover he makes the centre of his Augusteum. Mr. Bury thought it proved that the Augusteum “was also called the Forum of Constantine,” because a passage in _Cedrenus_ speaks of the Senate House (τὸ σενάτον) as in the Forum of Constantine. It is perfectly clear however from the _Notitia_ that there were two Senate Houses--one in the Forum mentioned in the extract we have given from the description of the sixth ward, and the other included in the second region as just quoted.[19]