S.M.S. Kronprinz Erzherzog Rudolf was a ‘turreted ironclad’ (Turmschiffe) commissioned in 1889, and in Austro-Hungarian service on and off until around February 1918. The main armament was three 305 mm guns mounted individually in barbettes.
This drawing is from “Austro-Hungarian Battleships in World War One,” by Zvonimir Freivogel:
ncc1717.com 