The Andromeda Class battleship is something I made up with the idea of a warship that was ridiculous in size, to the point of absurdity, in some alternate history in which battleship sizes simply increased beyond any real life proportions. This warship is 1049.2 metres, or 3440 feet long. It sports 64 18-inch guns in quadruple barreled turrets, and 106 15-inch guns in double-barreled turrets, in ship-of-the-line style broadside arrangements. This render shows it's size in comparison to four Admiral-Class battlecruisers, such as HMS Hood. It is run by a sextuple-screw configuration, six triple-bladed propellers run by triple-expansion reciprocating steam engines. It has four funnels, two bridges, one fore one rear, and three additional lookout masts, for delicate maneouvering, and in bad weather, as it is possible for the bridge to lose sight of much of the bow in fog.

All in all a ridiculously large vessel that would primarily be used against other ships of it's size, and land bombardment. I don't know if it would actually work, or experience too much trouble in rough seas warping the hull, but I'd like to think it's construction could withstand that.