Category: fortification
- Halifax Citadel
- Castell de Mur
- Komollói római kasztrum
- Castrul roman de la Pietroasele
- Candelo Ricetto
- Castle
- Porta Praetoria
- Tower
- Montagnana Old Town
- Castle
- Porta Principalis
- Porta Saracena
- Castrul roman de la Islaz - Racoviță
- Zuccarello
- Norman Castle
- Castrul roman Praetorium II
- Castrul roman de la Hoghiz
- Lotrioara fortress - ruins
- Castrul roman de la Putineiu
- Castrul roman de la Orheiu Bistriței
- Fortificația romano-bizantină La Milan
- ДЗОТ
- Centre Bastion Battery
- WW2 bunker
- WW2 Battery
- city wall
- city walls
- Ducal Castle
- Bastion
- Torre del Parco
- Tower
- Tower
- Tower
- Peshmerga defensive fortification
- Haldani Gadhi
- Norman Tower
- Bracciano Old Town
- Courtine Sainte Trinité
- Courtine Saint Sébastien
- Castrul roman de la Izbășești (Castrul roman de la Fâlfani)
- El Fortim
- Ruins of Old Baiya
- Bergfried
- Wallgraben
- Ramiers
- Castellalto Old Town
- Garrison
- Banda Fort
- Castrul roman de la Albota
- Union earthworks
- CC 19L
- CC 20L
- PC Bois de Beuveille 1
- Fort ruin