On the north, a probable line is given by the gateway, Por Episcopi, which once spanned the passage--now an open space--on the east side of the Archbishop's Palace (plan 17 B).

That gateway stood between the Via Teatina and the next street to the north, the Via dei Cerretani, and the Roman north wall and ditch apparently ran along the intervals between these two modern streets--as indeed the lines of certain mediaeval lanes suggest.

On the east the 'colonia' is supposed to have stretched to the Via del Proconsolo and the old Por S.Piero, probably the original east gate.

Here the traces of 'insulae' are ill preserved; the space in question would contain, and the mediaeval streets would admit of, twelve blocks in addition to the twenty noted above.
The southern limit of Roman Florence towards the Arno is altogether doubtful.

There are, or were, traces of Roman baths in the Via delle Terme, and it has been thought that the town stretched riverwards as far as the old gate Por S.Maria and the Piazza S.Trinita.The gate, however, is ill-placed and the line of wall implied by this theory is irregular.