An ironclad was a steam-propelled warship protected by steel or iron armor constructed from 1859 to the early 1890s. The ironclad was developed as a result of the vulnerability of wooden warships to explosive or incendiary shells. The first ironclad battleship, Gloire, was launched by the French Navy in November 1859, narrowly preempting the British Royal Navy. However, Britain built the first completely iron-hulled warships.
SMS Tegetthoff was an ironclad warship of the Austro-Hungarian Navy. She was built by the Stabilimento Tecnico Triestino shipyard in Trieste, between April 1876 and October 1881. She was armed with a main battery of six 28 cm (11 in) guns mounted in a central-battery. The ship had a limited career, and did not see action. In 1897, she was reduced to a guard ship in Pola, and in 1912 she was renamed Mars. She served as a training ship after 1917, and after the end of World War I, she was surrendered as a war prize to Italy, which sold her for scrapping in 1920.
SMS Kaiser was a 92-gun wooden ship of the line of the Austrian Navy, the last vessel of the type, and the only screw-driven example, to be built by the Austrians. She was built by the naval shipyard in Pola; she was laid down in March 1855, was launched in October 1858, and was completed the following year. The ship took part in the Second Schleswig War of 1864, but saw no action during her deployment to the North Sea. Kaiser did see action during the Seven Weeks' War two years later, during which she took part in the Battle of Lissa as the flagship of Anton von Petz, commander of the Austrian 2nd Division. Kaiser engaged several Italian ironclads simultaneously, rammed one—Re di Portogallo—and damaged another—Affondatore—with gunfire. In doing so, she became the only wooden ship of the line to engage an ironclad warship in battle.
The Drache-class ironclads were a pair of wooden-hulled armored frigates built for the Austro-Hungarian Navy in the 1860s, the first ironclads built for Austria-Hungary. Ordered in response to a pair of Italian ironclads in 1860, Drache and Salamander were laid down in early 1861, launched later that year, and completed in 1862. They participated in the Austrian victory over the Italians in the Battle of Lissa, where Drache destroyed the coastal defense ship Palestro, one of two Italian ships sunk in the action. Both ships were withdrawn from front-line service in 1875. Drache's hull was in poor condition, so she was discarded and eventually broken up in 1883, and Salamander became a harbor guard ship. She was hulked in 1883 and converted into floating storage for naval mines before being scrapped in 1895–1896.
Venezia was the second of two Roma-class ironclad warships built for the Italian Regia Marina in the 1860s. She was armed with a main battery of eighteen 254 mm (10 in) guns in a central armored casemate. Her lengthy construction time, a result of her re-design from a broadside ironclad, quickly rendered her obsolescent compared to the new turret ships that began to enter service in the 1880s. As a result, her career was limited. She became a training ship in 1881 and served until 1895. Venezia was broken up for scrap the next year.
Regina Maria Pia was the lead ship of the Regina Maria Pia class of ironclad warships built in French shipyards for the Italian Regia Marina in the 1860s. She and her three sister ships were broadside ironclads, mounting a battery of four 203 mm (8 in) and twenty-two 164 mm (6.5 in) guns on the broadside. Regina Maria Pia was laid down in July 1862, was launched in April 1863, and was completed in April 1864.
SMS Kaiser Max was an ironclad warship built for the Austro-Hungarian Navy in the 1870s, the lead ship of the Kaiser Max class. The ship was purportedly the same vessel that had been laid down in 1861, and had simply been reconstructed. This was a fiction, however; the head of the Austro-Hungarian Navy could not secure funding for new ships, but reconstruction projects were uncontroversial, so he "rebuilt" the three earlier Kaiser Max-class ironclads. Only the engines and parts of the armor plate were reused in the new Kaiser Max, which was laid down in February 1874, launched in December 1875, and commissioned in October 1876. The ship's career was fairly limited, in part due to slender naval budgets that prevented much active use. She made foreign visits and took part in limited training exercises in the 1880s and 1890s. Long since obsolete, Kaiser Max was removed from service in 1904 and converted into a barracks ship. After World War I, the ship was transferred to the Royal Yugoslav Navy as a war prize and renamed Tivat. Her fate thereafter is uncertain, either being sold for scrap in 1924 or retained through 1941.
SMS Don Juan d'Austria was an ironclad warship built for the Austro-Hungarian Navy in the 1870s, the second of the three ships of the Kaiser Max class. The ship was purportedly the same vessel that had been laid down in 1861, and had simply been reconstructed. This was a fiction, however; the head of the Austro-Hungarian Navy could not secure funding for new ships, but reconstruction projects were uncontroversial, so he "rebuilt" the three earlier Kaiser Max-class ironclads. Only the engines and parts of the armor plate were reused in the new Don Juan d'Austria, which was laid down in February 1874, launched in December 1875, and commissioned in October 1876. The ship's career was fairly limited, in part due to slender naval budgets that prevented much active use. She made foreign visits and took part in limited training exercises in the 1880s and 1890s. Long since obsolete, Don Juan d'Austria was removed from service in 1904 and used as a barracks ship through World War I. After the war, she sank under unclear circumstances.
SMS Erzherzog Albrecht was an ironclad warship built for the Austro-Hungarian Navy in the 1870s, the only member of her class. Her design was similar to the ironclad Custoza, but Erzherzog Albrecht was built to a smaller size; like Custoza, she was an iron-hulled casemate ship armed with a battery of eight heavy guns. The ship was laid down in June 1870, was launched in April 1872, and was commissioned in June 1874. The ship's service career was limited; tight naval budgets precluded an active fleet policy in the 1870s, which did not markedly improve in the 1880s. Her first period of active service came in 1881 and 1882, when she helped suppress a revolt in Cattaro Bay. In 1908, she was converted into a tender for the gunnery training school, having been renamed Feuerspeier. In 1915, she became a barracks ship, and after World War I ended in 1918, was ceded to Italy as a war prize. She was renamed Buttafuoco, served in the Italian Navy as a hulk through World War II before being scrapped in 1950.
SMS Custoza was an ironclad warship built for the Austro-Hungarian Navy in the 1870s, the only member of her class. She was the first Austro-Hungarian ironclad to be built after the navy studied the results of the Battle of Lissa of 1866; she was also the first iron-hulled capital ship to be built for the Austro-Hungarian Navy. She was laid down in November 1869, launched in August 1872, and completed in February 1875. Her career was fairly limited, in part due to reduced naval budgets in the 1870s that also delayed her completion. Custoza was somewhat more active in the 1880s, taking part in an international naval demonstration against the Ottoman Empire in 1880, being modernized in 1882, and a trip to Spain for the Barcelona Universal Exposition in 1888. The ship became a training ship in 1902, was converted into a barracks ship in 1914, and after World War I, was awarded as a war prize to Italy. Custoza was immediately broken up.
SMS Lissa, named for the Battle of Lissa, was a unique ironclad warship built for the Austro-Hungarian Navy in the 1860s and 1870s, the only member of her class. She was the first casemate ship built for Austria-Hungary, she was armed with a main battery of twelve 9-inch (229 mm) guns in a central armored casemate, unlike the earlier broadside ironclads. Construction of the ship lasted from June 1867 to May 1871, and was delayed by budgetary shortfalls; the lack of funding also plagued the ship during her career, preventing her from taking an active role in the fleet. She spent the majority of her time in service laid up in Pola, apart from a lengthy reconstruction in 1880–1881. Lissa was ultimately stricken from the fleet in 1892 and broken up for scrap starting the following year.
The Erzherzog Ferdinand Max class consisted of a pair of ironclad warships—Erzherzog Ferdinand Max and Habsburg—built for the Austrian Navy in the 1860s. They were the last broadside armored frigates to be built for the Austrian Empire, and the last vessels completed to see action against the Italians at the Battle of Lissa in 1866. Intended to have been armed with new breech-loading Krupp guns, the outbreak of the Seven Weeks' War prevented the delivery of the guns, forcing the Austrian Navy to arm the ships with a battery of sixteen older 48-pounder muzzle-loading guns.
SMS Habsburg was the second and final member of the Erzherzog Ferdinand Max class of broadside ironclads built for the Austrian Navy in the 1860s. She was built by the Stabilimento Tecnico Triestino; her keel was laid down in June 1863, she was launched in June 1865, and commissioning in June 1866 at the outbreak of the Third Italian War of Independence and the Austro-Prussian War, fought concurrently. The ship was armed with a main battery of sixteen 48-pounder guns, though the rifled guns originally intended, which had been ordered from Prussia, had to be replaced with old smoothbore guns until after the conflicts ended.
The Kaiser Max class of broadside ironclads was a group of three vessels built for the Austro-Hungarian Navy in the 1860s. The class consisted of Kaiser Max, the lead ship, Prinz Eugen, and Don Juan d'Austria. They were an improved version of the preceding Drache class, being larger, carrying a larger gun battery, and having more powerful engines. The three ships were all laid down in 1861, launched in 1862, and completed in 1863.
SMS Kaiser Max was the lead ship of the Kaiser Max class of armored frigates built for the Austrian Navy in the 1860s. Her keel was laid in October 1861 at the Stabilimento Tecnico Triestino shipyard; she was launched in May 1862, and was completed in 1863. She carried her main battery—composed of sixteen 48-pounder guns and fifteen 24-pounders—in a traditional broadside arrangement, protected by an armored belt that was 110 mm (4.3 in) thick.
SMS Prinz Eugen was the second member of the Kaiser Max class built for the Austrian Navy in the 1860s. Her keel was laid in October 1861 at the Stabilimento Tecnico Triestino shipyard; she was launched in June 1862, and was completed in March 1863. She carried her main battery—composed of sixteen 48-pounder guns and fifteen 24-pounders—in a traditional broadside arrangement, protected by an armored belt that was 110 mm (4.3 in) thick.
Josef Ritter von Romako was an Austro-Hungarian naval architect in the 19th century. He was responsible for designing most of the ironclad warships of the Austro-Hungarian Navy, from the first vessels of the Drache class in the early 1860s to SMS Tegetthoff, built in the late 1870s and early 1880s. He was also responsible for designing the Zara-class cruisers.
A naval arms race between the Austrian Empire and Italy began in the 1860s when both ordered a series of ironclad warships, steam-propelled vessels protected by iron or steel armor plates and far more powerful than all-wood ships of the line. These ships were constructed to establish control over the Adriatic Sea in the event of a conflict between the two countries.
