Our knowledge is more than enough already for the purposes of this chapter.
We can already see that the town-plan described in the foregoing pages was widely used in the provinces of the Empire.

We find it in Africa, in Central and Western Europe, and indeed wherever Rorrran remains have been carefully excavated; we find it even in remote Britain amidst conditions which make its use seem premature.

Where excavation has as yet yielded no proofs, other evidence fills the gap.

In southern Gaul, as it happens, archaeological remains are unhelpful.
But just there an inscription has come to light, the only one of its kind in the Roman world, which proves that one at least of the 'coloniae' of Gallia Narbonensis was laid out in rectangular oblong plots.

It is clear enough that this town-plan was one of the forms through which the Italian civilization diffused itself over the western provinces.
The exact measure of its popularity is, however, hard to determine.