Conte di Cavour was the name ship of the three Conte di Cavour-class dreadnought battleships built for the Royal Italian Navy in the 1910s. Completed in 1915 she served during World War I, although she was little used and saw no combat. The ship supported operations during the Corfu Incident in 1923 and spent much of the rest of the decade in reserve. She was rebuilt between 1933 and 1937 with more powerful guns, additional armor and considerably more speed than before.
Duilio was an Italian Andrea Doria-class battleship that served in the Regia Marina during World War I and World War II. She was named after the Roman fleet commander Gaius Duilius. Duilio was laid down in February 1912, launched in April 1913, and completed in May 1916. She was initially armed with a main battery of thirteen 305 mm (12.0 in) guns, but a major reconstruction in the late 1930s replaced these with ten 320 mm (13 in) guns. Duilio saw no action during World War I owing to the inactivity of the Austro-Hungarian fleet during the conflict. She cruised the Mediterranean in the 1920s and was involved in the Corfu incident in 1923.
Leonardo da Vinci was the last of three Conte di Cavour-class dreadnoughts built for the Regia Marina in the early 1910s. Completed just before the beginning of World War I, the ship saw no action and was sunk by a magazine explosion in 1916 with the loss of 248 officers and enlisted men. The Italians blamed Austro-Hungarian saboteurs for her loss, but it may have been accidental. Leonardo da Vinci was refloated in 1919 and plans were made to repair her. Budgetary constraints did not permit this, and her hulk was sold for scrap in 1923.
The Andrea Doria class was a pair of dreadnought battleships built for the Royal Italian Navy between 1912 and 1916. The two ships—Andrea Doria and Duilio—were completed during World War I. The class was an incremental improvement over the preceding Conte di Cavour class. Like the earlier ships, Andrea Doria and Duilio were armed with a main battery of thirteen 305-millimeter (12.0 in) guns.
Dante Alighieri was the first dreadnought battleship built for the Regia Marina and was completed in 1913. The ship served as a flagship during World War I, but saw very little action other than the Second Battle of Durazzo in 1918 during which she did not engage enemy forces. She never fired her guns in anger during her career. Dante Alighieri was refitted in 1923, stricken from the Navy List five years later and subsequently sold for scrap.
Andrea Doria was the lead ship of her class of battleships built by the Regia Marina. The class included only one sister ship, Duilio. Andrea Doria was named after the 16th-century Genoese admiral of the same name. Laid down in March 1912, the battleship was launched a year later in March 1913, and completed in March 1916. She was armed with a main battery of thirteen 305 mm (12.0 in) guns and had a top speed of 21 knots.
The Regina Margherita class was a class of two battleships built for the Italian Regia Marina between 1898 and 1905. The class comprised two ships: Regina Margherita and Benedetto Brin. The ships were designed by the latter's namesake, Benedetto Brin, who died before the ships were completed. They were armed with a main battery of four 12 in (305 mm) guns and could steam at a speed of 20 knots.
The Francesco Caracciolo-class battleships were a group of four super-dreadnought battleships designed for the Regia Marina in 1913 and ordered in 1914. The first ship of the class, Francesco Caracciolo, was laid down in late 1914; the other three ships, Cristoforo Colombo, Marcantonio Colonna, and Francesco Morosini followed in 1915. Armed with a main battery of eight 381 mm (15 in) guns and possessing a top speed of 28 knots, the four ships were intended to be the equivalent of the fast battleships like the British Queen Elizabeth class.
Regina Margherita was the lead ship of her class of pre-dreadnought battleships built for the Italian Regia Marina between 1898 and 1904. She had one sister ship, Benedetto Brin. Regina Margherita saw action in the Italo-Turkish War of 1911–1912. By the outbreak of World War I in 1914, the battleship had been reduced to a training ship. She struck two naval mines on the night of 11–12 December 1916 while steaming off Valona. She sank with heavy loss of life: 675 men were killed, and only 270 survived.
Benedetto Brin was a Regina Margherita-class pre-dreadnought battleship built for the Italian Regia Marina between 1899 and 1905. The ship was armed with a main battery of four 12-inch (300 mm) guns and was capable of a top speed of 20 knots. Benedetto Brin saw combat in the Italo-Turkish War of 1911–1912, including the bombardment of Tripoli in October 1911. She was destroyed by an internal explosion during World War I in September 1915, which killed over 450 of the ship's crew.
Ammiraglio di Saint Bon was a pre-dreadnought battleship of the Regia Marina built during the 1890s. She was laid down in July 1893, launched in April 1897, and completed in May 1901. She was the lead ship of her class, and had one sister ship, Emanuele Filiberto. The ship was armed with a main battery of four 254 mm (10 in) guns and was capable of a top speed of 18 knots.
The Re Umberto class were a group of three ironclad battleships built for the Italian Navy in the 1880s and 1890s. The ships—Re Umberto, Sicilia, and Sardegna—were built as the culmination of a major naval expansion program begun in the 1870s following Italy's defeat at the Battle of Lissa in 1866. The Re Umbertos incorporated several innovations over previous Italian designs, including a more efficient arrangement of the main battery, installation of wireless telegraphs, and in Sardegna, the first use of triple-expansion steam engines in an Italian capital ship. Designed by Benedetto Brin, they retained the very thin armor protection and high top speeds of his earlier designs.
The Emanuele Filiberto was a pre-dreadnought battleship built for the Italian Navy during the 1890s. Her keel was laid down in October 1893 and she was launched in September 1897; work was completed in April 1902. She had one sister ship, Ammiraglio di Saint Bon, the lead ship of the Ammiraglio di Saint Bon class. She was armed with a main battery of four 254 mm (10 in) guns and was capable of a speed in excess of 18 knots.
The Ammiraglio di Saint Bon class was a pair of pre-dreadnought battleships built for the Italian Navy during the 1890s. The class comprised two ships: Ammiraglio di Saint Bon, the lead ship, and Emanuele Filiberto. They were armed with a main battery of four 254 mm (10 in) guns and were capable of a top speed of 18 knots. Smaller and less powerfully-armed than most contemporary battleships, they marked a brief departure from Italian capital ship design, which had previously emphasized large ships equipped with large guns.
Regina Elena was the lead ship of her class of pre-dreadnought battleships built for the Italian Regia Marina. The ship was built by the La Spezia shipyard between 1901 and 1907, and was armed with a main battery of two 305 mm (12 in) guns and twelve 203 mm (8 in) guns. She was quite fast for the period, with a top speed of nearly 21 knots. Regina Elena was active in both the Italo-Turkish War with the Ottoman Empire in 1911–1912, where she participated in the Italian conquest of Cyrenaica, and World War I in 1915–1918, where she saw no action due to the threat of submarines in the narrow confines of the Adriatic Sea. She was retained for a few years after the war, but was ultimately stricken in February 1923 and broken up for scrap.
Vittorio Emanuele was an Italian pre-dreadnought battleship, laid down in 1901, launched in 1904 and completed in 1908. She was the second member of the Regina Elena class, which included three other vessels: Regina Elena, Napoli, and Roma. Vittorio Emmanuele was armed with a main battery of two 305 mm (12 in) guns and twelve 203 mm (8 in) guns. She was quite fast for the period, with a top speed of nearly 21 knots.
Roma was an Italian pre-dreadnought battleship, laid down in 1903, launched in 1907 and completed in 1908. She was the third member of the Regina Elena class, which included three other vessels: Regina Elena, Napoli, and Vittorio Emanuele. Roma was armed with a main battery of two 305 mm (12 in) guns and twelve 203 mm (8 in) guns. She was quite fast for the period, with a top speed of nearly 21 knots.
Napoli was a Regina Elena-class pre-dreadnought battleship built for the Italian Regia Marina in 1903–08. She was the last member of the four-ship class, which included the lead ship Regina Elena, Vittorio Emanuele, and Roma. Napoli was armed with a main battery of two 305 mm (12 in) and twelve 203 Mm (126,138 mi) guns, and was capable of a top speed of 21 knots.
The Nino Bixio class was a pair of protected cruisers built for the Italian Regia Marina in the 1910s. The two ships, Nino Bixio, and Marsala, were built in Castellammare between 1911 and 1914. They were intended to serve as scouts for the main Italian fleet, and as such required a high top speed. They were overweight as built, which prevented them from reaching their intended maximum speed. They were a disappointment in service, especially compared to the earlier—and faster—cruiser Quarto, which cut their careers short.
Regia Marina 
