Regina Elena-class. ©Warshipsresearch.blogspot.com
Sketch published by Brassey’s Naval Annual 1909. ©Warshipsresearch.blogspot.com
Sketch published by Mitteilungen aus dem Gebiete des Seewesens 1910©Warshipsresearch.blogspot.com
Sketch appearance 1913©Warshipsresearch.blogspot.com

Conte di Cavour-class. ©Warshipsresearch.blogspot.com
Preceded by Regina Elena-class succeeded by Conte di Cavour-class. Laid down by Regio Cantiere di Castellammare di Stabia, Castellammare di Stabia, Italy on 6 June 1909, launched on 20 August 1910, completed on 15 January 1913, stricken on 1 July 1928 and broken up. Main armament 4x3-30.5cm/12” gun turrets on the centerline.
Designed by rear admiral engineer Edoardo Masdea (23 July 1849 Naples-12 May 1910 Rome, Italy) using the all big gun ship philosophy of general Vittorio Emilo Cuniberti 7 June 1854 Turin, Italy-19 December 1913, Rome, Italy.
Brassey’s Naval Annual 1909 published a sketch with the notice ‘design uncertain’. Called ‘A’. Speed 24 knots. Horsepower 30,000 ihp. Displacement 19,000 tons. Length 492 feet. Armament 12-12” guns, 18-4.7” guns and 16-12pd guns. On the sketch however 8-12” guns divided as on the center line fore and aft 1x2-8” turret and amidships diagonal 2x2-8” gun turrets. Furthermore 18-4.7” guns. Flottes de Combat 1909-1910 published a similar sketch.
Mitteilungen aus dem Gebiete des Seewesens 1910 p 706 published another sketch with an armament of 4 gun turrets, two fore and 2 aft with the 2x30.5cm gun turrets superfiring over the 3x30.5cm gun turrets. The difference with the succeeding Conte di Cavour-class was 1x3-30.5cm gun turret more amidships placed at the latter. The anti torpedo boats defence of both classes was identical namely 18-12cm guns although different positions. The information dealing with the main armament differs constantly.
P. 287 mentioned 4x3-30.5cm gun turrets on the centerline.
P. 786 reported that at the last moment Italy choose for twin turrets but at the end for triple turrets.
P. 1031 reported probably 4 triple turrets instead of 2 twin and 2 triple turrets.
P. 1047 reported 12 guns instead the 10 until then mentioned and presumably to be mounted in 4 triple turrets.
P. 1155 referred to Esercito italiano armed with 12-30.5cm L/46 guns (in triple turrets on the centerline, a sketch confirms that), 2015cm L/50 guns (4x2 turrets, 12 casemate), 13-7.6cm L/50 guns and 3 torpedo tubes. Flottes de Combat 1911 published an almost similar sketch.