These stone towers were erected in the Eastern Cape of South Africa during the 1800's when the British Crown tried to tame the wild frontiers of South Africa - to keep the British solders safe these towers were erected at regular intervals between the Main Forts and between British settlements, they were also erected from stone and and were also designed in a larger more squat solid stone fortresses, that I will make in a follow up print The letter D on the roof must be directly above the entrance door in order for the roof to line up with pillars NO SUPPORTS REQUIRED only decent brim

Attribution - Creative Commons

British, BritishXhosawar, Blockhouses, FortTowers, SouthAfricanwar, 1800s, Frontierwars