Arms and Armour
A half tower (sometimes half-tower), open tower, open-backed tower or open-gorged tower (German: Schalenturm, Halbschalenturm or Schanzturm) is a fortified stone tower in an external wall or castle enceinte that is open, or only lightly constructed, at the rear.
Bolesław II the Bold's expedition to Kiev (1069–1071).
Colt Model 1855 Sidehammer Pocket Revolver.
Text from Wikipedia; plate via Wikimedia Commons. Text CC BY-SA 4.0; plate freely licensed (see Commons). Source record. Images and catalogue data are reproduced from open-access collections.