Lib. 1.
Cap. 3.
Uildings are either Publick, or Private; Those that are Publick, appertain either to Security, or Religion, or Publick Convenience. The Fortifications of Cities are for Security, the Temples for Religion, the Market-places, Town-Houses, Theatres, Academies are for the Publick Convenience.
The Disposition and Figures of the Ramparts were so ordered, that the Towers advanced out of the Walls to the end, that when the Enemy approached them, the Besieged which were in the Towers, might fall upon their Flank, both on the Right and the Left.
They took likewise great Care to make the Approaches to the Walls difficult, ordering their Ways so, that they came not directly, but to the Left of the Gate. For by this means, the Besiegers were constrained to present to them that were upon the Walls the Right side, which was not covered with a Buckler.
The Figure of a strong place ought neither to be Square, nor composed of Angles that advance too far. But the Ancients made them with many Sinuosities or Corners, for Angles that are too far advanc'd, are more advantageous for the Besiegers, than the Besieged.
The thickness of the Wall was so ordered, that two Armed Men might walk by one another upon the Wall without justling.
They made their Walls strong and durable, with sindged Beams of Olive, which bound them and kept them up.
Although there be nothing that makes the Ramparts so strong as Earth, they had not for all that the Custom of making Terrasses, unless it were in some place where some Eminency was so near the Wall, that the Besiegers might easily enter.
To make the Terrasses strong, and to hinder the Earth from pushing down the two Walls that supported it, they made Buttresses or Counter-forts which went from one Wall to another, to the end, that the Earth being divided into many parts, might not have that weight to push the Walls.