If the _Miliarium Aureum_ had been now in Being, or the People of _Constantinople_ had preserved the Memory of its Situation, we might easily discover, from the _antient Description of the Wards_, (which tells us, that the fourth _Ward_ extended it self, the Hills rising on the Right and Left, from the _Miliarium Aureum_ to a plain level Ground) that it was in the first Valley, or on the Ridge of the Hill that arises just above it. Nor could we have failed to make the like Discovery from the Remains of the _Augustæum_, the _Basilica_, the _Nymphæum_, and other fine Buildings, had they not been entirely buried in their own Ruins. But since no Observations at present can be made that Way, I was in Suspense, whether or no the Valley, where the fourth _Ward_ stood, was not the same Valley which I had described at the first; because it is common to other Vales, to have Hills rising on the right and left. And when I had sufficiently instructed my self from the Writings and Histories of learned Men, what Monuments of Antiquity had formerly been in the fourth _Ward_, and where they had stood, I was soon sensible that the fourth _Ward_ stood in the first Valley, and on the Sides of it, and on the Hill near to the Church of St. _Sophia_, as the Reader will perceive from the following History. CHAP. XVII. _Of the_ Forum _called the_ Augustæum, _of the Pillar of_ Theodosius, _and_ Justinian, _and the_ Senate-House. _Procopius_ writes, that the _Forum_ which was formerly called the _Augustæum_, was surrounded with Pillars, and was situate before the Imperial Palace. Not only the _Forum_ is at present quite defaced, but the very Name of it is lost, and the whole Ground where it stood is built upon. The Palace is entirely in Ruines, yet I collect from the _Pedestal_ of a Pillar of _Justinian_ lately standing, but now removed by the _Turks_, which _Procopius_ says was built by _Justinian_ in the _Augustæum_, and _Zonaras_ in the Court before the Church of _Sophia_, that the _Augustæum_ stood where there is now a Fountain, at the West End of the Church of St. _Sophia_. _Suidas_ says, that _Justinian_, after he had built the Church of St. _Sophia_, cleansed the Court, and paved it with Marble, and that it was formerly called the _Forum Augustæum_; and adds, that he erected his own Statue there. _Procopius_ writes, _That there was a certain_ Forum _facing the Senate House, which was called by the Citizens the_ Augustæum; _where are seven Stones, so cemented together in a quadrangular Manner, and are so contracted one within another the upper within the lower Stone, that a Man may conveniently sit down upon every Projecture of them_. I was more induced to give this Account from _Procopius_, of the Pedestal, because I do not find it in his _printed Works_. Upon the Top of it, says he, there’s erected a large Pillar, composed of many Stones covered with Brass, which did at once both strengthen and adorn them.