French screw steam floating battery la Tonnante (1854) in 1859

Homeport Toulon, France. Laid down at Brest, France on 5 September 1854 and launched on 17 March 1855. Machinery manufactured at Le Creuzot, France and delivering 225hp. Wood built. Armed with 18 guns.

Source
Hans Busk. The Navies of the World, London, United Kingdom, 1859.