SCHNEIER

Defense in Depth, Medieval Style_SCHNEIER:30ECED054233AC19DF65A0F48324D850

Description

This article on the walls of Constantinople is fascinating.

> The system comprised four defensive lines arranged in formidable layers:
>
> * The brick-lined ditch, divided by bulkheads and often flooded, 15­20 meters wide and up to 7 meters deep.
> * A low breastwork, about 2 meters high, enabling defenders to fire freely from behind.
> * The outer wall, 8 meters tall and 2.8 meters thick, with 82 projecting towers.
> * The main wall--a towering 12 meters high and 5 meters thick--with 96 massive towers offset from those of the outer wall for maximum coverage.

>
> Behind the walls lay broad terraces: the parateichion, 18 meters wide, ideal for repelling enemies who crossed the moat, and the peribolos, 15–­20 meters wide between the inner and outer walls. From the moat's bottom to the highest tower top, the defences reached nearly 30 meters--a nearly unscalable barrier of stone and ingenuity.
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ID SCHNEIER:30ECED054233AC19DF65A0F48324D850
Published Apr 15, 2026 at 10:47
Modified Apr 15, 2026 at 10:48

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