Terrible class French coastal defense Ironclad predreadnought battleship Caiman.

Amongst the last representatives of the so-called 'monster gun era' that started in 1872 with the launch of the Italian Duilio, vessels of this class mounted two very large (16.5" caliber) single guns in barbettes fore and aft. Caiman was launched in May 1885 and scrapped in 1927.
Class details: http://www.cityofart.net/bship/fr_requin.html