hornwork
{{Short description|Fortification element}}
Image:Table of Fortification, Cyclopaedia, Volume 1.jpg]]
File:Hornwerk.png of Zittau inside a hornworkEuropaeum Theatrum, Volume 5, plate 12. Published in 1651 in Frankfurt am Main.]]
A hornwork is an element of the Italian bastion system of fortification. Its face is flanked with a pair of half-bastions. It is distinguished from a crownwork, because crownworks contain full bastions at their centers. They are both outworks.