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A crownwork outside a bastion
Feature 'l' is a crownwork. From the Cyclopaedia.

A crownwork is an element of the trace italienne system of fortification and is effectively an expanded hornwork. It consists of a full bastion with the walls on either side ending in half bastions from which longer flank walls run back towards the main fortress.[1]

The crownwork was used to extend the fortified area in a particular direction, often in order to defend a bridge, prevent the enemy occupying an area of high ground, or simply strengthen the overall fortifications in the expected direction of attack.[2]


  1. ^ Griffiths 1862, p. 262.
  2. ^ Editor 1830, p. 590.


  • Griffiths, Frederick Augustus (1862). The Artillerist's Manual, and British Soldier's Compendium (9th ed.). Parker & Son.
  • Editor (1830). "A Popular View of Fortification and Gunnery, No. I. 49, No. II. 316, No. III. 586". The United Service Journal and Naval and Military Magazine. London: Henry Colburn and Richard Bentley.
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