Passage 10.36.4
διάστημα δὲ ἀπὸ τοῦ προτέρου τῶν κύκλων ἐπὶ τὸν δεύτερόν ἐστιν ὀργυιά· κατασκευὴ δὲ πύργων ἢ ἐπάλξεων ἢ εἴ τι ἄλλο ἐς εὐπρέπειαν τείχους, παρεῖται τὰ πάντα σφίσιν ἅτε τειχίζουσιν ἐπὶ μόνῳ τῷ αὐτίκα ἀμύνεσθαι. ἔστι δὲ ἀγορά τε Ἀμβροσσεῦσιν οὐ μεγάλη καὶ ἀνδριάντων ἐν αὐτῇ λίθου πεποιημένων κατεάγασιν οἱ πολλοί.
The interval from the outer of these circuits to the inner one equals one fathom; as for the building of towers or battlements or any other decorative feature of the wall, they omitted all of these, since their fortification had only immediate defense as its purpose. The Ambrossians have an agora, which is not large, and in it stand statues fashioned from stone, most of which are now broken.