Running down the middle of the Forum is a rough, ancient causeway, with its blocks of lava still in their original position, but so disjointed that it is no easy task walking over them.  On the other side is the raised platform of the Basilica Julia of Augustus, extending from north to south, the whole length of the Forum, with steps leading up to it from the paved street.  This stupendous law court, the grandest in Rome where Trajan sat to administer justice, and from whose roof Caligula day after day lavishly threw down money to the people, has, by its own identity being established beyond dispute, more than any other discovery helped to determine the topography of the Roman Forum.  It was begun by Julius Caesar on the site of the older Basilica Sempronia, which had previously partially replaced the Veteres Tabernae or shops of early times required for the trades carried on in a market-place, and also the schools for children where Appius Claudius had first seen Virginia reading.  Having been partially destroyed by fire, Augustus afterwards completed and greatly enlarged the building.  It was used as the place of meeting of the Centumviri, a court which we learn from the younger Pliny, who himself practised before it, had a hundred and eight judges sitting in four separate tribunals, within sight and hearing of one another, like the old courts in Westminster Hall.  The Basilica is not yet entirely excavated, a large part of its breadth being still under modern buildings.  It consisted of a series of plain, massive arches built of travertine.  The pavement is wonderfully perfect, being composed of a mosaic pattern of valuable marbles, doubtless saved from destruction or removal to build some church or palace by the fortunate circumstance that the ruins of the Basilica covered and concealed them at an early period.  On this pavement and on the steps leading up to it are incised numerous squares and circles which are supposed to have been tabulae lusoriae, or gaming-tables.  A few have inscriptions near them alluding to their use.  Cicero mentions the dice-players of the Forum with reprobation; and the fact that such sports should have intruded into the courts of justice shows that the Romans had lost at this time their early veneration for the law.  The rows of brick arches seen on the platform are mere modern restorations, placed there by Cavaliere Rosa to indicate the supposed original plan of the building.  At the south end of it an opening in the pavement shows a part of the Cloaca Maxima, with the sewerage passing through it underneath.

The ancient street between the Basilica Julia and the Temple of Castor and Pollux, is undoubtedly the famous Vicus Tuscus, so called after the Etruscan soldiers who belonged to the army of Porsenna, and, being defeated at Ariccia, took refuge in this part of Rome.  This street, so often mentioned by classic writers, led to the Circus Maximus, and is now identified with the Via dei Fienili; the point of departure from