Turres itaque rutundae aut polygoneae sunt faciendae; quadratas enim machinae celerius dissipant, quod angulos arietes tundendo frangunt, in rotundationibus autem, uti cuneus, ad centrum adigendo laedere non possunt.
The towers therefore are to be made round or polygonal. For engines more quickly demolish square towers, because the battering-rams beat and break the angles; whereas in the case of rounded surfaces, even when they drive the battering-rams wedge-fashion towards the centre, they cannot hurt them.
final_alignments\Vitruvius_Architecture_Book_1.json