Plato, Laws 848e

ἱερὰ ταῦτα, ὅπῃ ἂν ὁ τόπος ὑψηλότατος ᾖ, τοῖς φρουροῖς ὑποδοχὴν ὅτι μάλιστα εὐερκῆ· τὴν δὲ ἄλλην χώραν κατασκευάζειν πᾶσαν δημιουργῶν τριακαίδεκα μέρη διελομένους, καὶ τὸ μὲν ἐν ἄστει κατοικίζειν, διελομένους αὖ καὶ τοῦτο εἰς τὰ δώδεκα μέρη τῆς πόλεως ἁπάσης, ἔξω τε καὶ ἐν κύκλῳ κατανεμηθέντας, ἐν τῇ κώμῃ δὲ ἑκάστῃ τὰ πρόσφορα γεωργοῖς γένη τῶν δημιουργῶν συνοικίζειν. τοὺς δʼ ἐπιμελητὰς εἶναι τούτων πάντων τοὺς τῶν ἀγρονόμων ἄρχοντας, ὅσων τε καὶ ὧντινων ὁ τόπος ἕκαστος δεῖται, καὶ ὅπου κατοικοῦντες ἀλυπότατοί τε καὶ ὠφελιμώτατοι ἔσονται τοῖσιν γεωργοῖσι.

to form a stronghold, as well fenced as possible, for the garrison; and all the rest of the land we shall provide for by dividing the craftsmen into thirteen sections, of which one shall settle in the city (and this section shall be subdivided again into twelve parts, like the whole city itself, and distributed round about it in the suburbs); and in each village we shall settle the classes of craftsmen that are serviceable to farmers. Of all these the chiefs of the land-stewards shall be the supervisors, determining how many and what craftsmen each place requires, and where they shall dwell so as to be of least trouble and greatest use