How many guns could the battleship for the Imperial German Navy, which was the fourth pre-dreadnought and replaced ironclad battleships of 1870s and 1880s, carry?
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SMS Kurfürst Friedrich Wilhelm SMS "Kurfürst Friedrich Wilhelm" ("His Majesty's Ship Elector Friedrich Wilhelm") was one of the first ocean-going battleships of the Imperial German Navy. The ship was named for Prince-elector ("Kurfürst") Friedrich Wilhelm, 17th-century Duke of Prussia and Margrave of Brandenburg. She was the fourth pre-dreadnought of the "Brandenburg" class , along with her sister ships "Brandenburg" , "Weissenburg" , and "Wörth" . She was laid down in 1890 in the Imperial Dockyard in Wilhelmshaven, launched in 1891, and completed in 1893 at a cost of 11.23 million marks. The "Brandenburg"-class battleships carried six large-caliber guns in three twin turrets, as opposed to four guns in two turrets, as was the standard in other navies.
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Pre-dreadnought battleship Pre-dreadnought battleships were sea-going battleships built between the mid- to late 1880s and 1905, before the launch of HMS "Dreadnought" . Pre-dreadnoughts replaced the ironclad battleships of the 1870s and 1880s. Built from steel, and protected by hardened steel armour, pre-dreadnought battleships carried a main battery of very heavy guns in barbettes (open or with armoured gunhouses) supported by one or more secondary batteries of lighter weapons. They were powered by coal-fuelled triple-expansion steam engines.
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Nautilus-class minelayer The "Nautilus" class was a pair of minelaying cruisers built by the Imperial German Navy. "Nautilus" was laid down in 1905 and completed by 1907, and SMS "Albatross" was laid down in 1907, and completed in 1908. Both ships were built by the AG Weser shipyard in Bremen, but to slightly different designs. "Nautilus" had a clipper bow, while "Albatross" had a bow similar to contemporary German light cruisers. The ships were armed with a battery of 8.8 cm guns and had a capacity of 168–288 naval mines.
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Kaiser-class battleship The "Kaiser" class was a class of five battleships that were built in Germany prior to World War I and served in the Imperial German Navy during the war. They were the third class of German dreadnoughts, and the first to feature turbine engines and superfiring turrets. The five ships were "Kaiser" , "Friedrich der Grosse" , "Kaiserin" , "Prinzregent Luitpold" , and "König Albert" . As was usual for German battleships of the period, the "Kaiser" class mounted main guns that were smaller than those of their British rivals: 30.5 cm , compared to the 34.3 cm guns of the British "Orion" class .
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Blitz-class aviso The "Blitz" class was a pair of avisos built by the Imperial German Navy ("Kaiserliche Marine") in the 1880s. The ships, "Blitz" and "Pfeil" , were the first steel-hulled ships of any kind built by the German Navy, and the progenitors of the later light cruisers of the "Gazelle" type. They were armed with a 12.5 cm gun and one 35 cm torpedo tube as their principal armament, and were capable of a top speed in excess of 15 kn .
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Kaiser Friedrich III-class battleship "Kaiser Friedrich III"-class battleships were a class of pre–World War I, pre-dreadnought battleships of the German Kaiserliche Marine. The class was made up of five ships, all of which were named for German emperors. The "Kaiser Friedrich III" class saw the introduction of the traditional armament layout for German battleships—four large-caliber guns, but of comparatively smaller caliber compared to contemporary battleships, in two gun turrets—prior to the advent of the dreadnought type of battleship in the early 1900s. They also standardized the use of three screws for battleships.
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Trento-class cruiser The "Trento" class was a group of two heavy cruisers built for the Italian "Regia Marina" (Royal Navy) in the late 1920s, the first such vessels built for the Italian fleet. The two ships in the class—"Trento" and "Trieste" , were named after the redeemed cities of Trento and Trieste taken from the Austro-Hungarian empire after the victory in World War I. The ships were very lightly armored, with only a 70 mm thick armored belt, though they possessed a high speed and heavy armament of eight 203 mm guns. Nominally built under the restrictions of the Washington Naval Treaty, the two cruisers nevertheless exceeded the displacement limits imposed by the treaty.
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L 20 α-class battleship L 20 α was a design plan for a class of battleships to be built in 1918 for the Kaiserliche Marine during World War I. The design was selected on 2 October 1917, and construction was to have started 11 September 1918. The ships would have been significantly larger than the preceding "Bayern"-class battleship s, at 238 m long, compared to 180 m for the preceding ships. The ships would have been the first German warship to have mounted guns larger than 38 cm . However, Germany's declining war situation and the transfer of emphasis within the Navy from capital ships to submarines meant that the ships would never be constructed.
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SMS Panther (1885) SMS "Panther" was a torpedo cruiser ("Torpedoschiff") of the Austro-Hungarian Navy. She and her sister ship, "Leopard" were part of a program to build up Austria-Hungary's fleet of torpedo craft in the 1880s. She was the lead ship of her class, and was built in Britain by Armstrong, from her keel laying in October 1884 to her completion in December 1885. She was armed with a battery of two 12 cm guns and ten 47 mm guns, along with four 356 mm torpedo tubes.
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Re Umberto-class ironclad 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 Umberto"s 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.
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Regioni-class cruiser The Regioni class was a group of six protected cruisers built for the Italian "Regia Marina" (Royal Navy) in the late 1880s through the early 1900s. The class comprised "Umbria" , "Lombardia" , "Etruria" , "Liguria" , "Elba" , and "Puglia" , all of which were named for regions of Italy with the exception of "Elba", which was named for the island. The class is sometimes referred as the "Umbria" class, for the first ship to be laid down. The ships, built by four different shipyards, varied slightly in their size, speed, and armament, but all could steam at about 18 kn and their main armament consisted of four 15 cm guns and six 12 cm guns.
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SMS Irene SMS "Irene" was a protected cruiser or "Kreuzerkorvette" of the German Imperial Navy ("Kaiserliche Marine") and the lead ship of the "Irene" class . She had one sister, "Prinzess Wilhelm" ; the two ships were the first protected cruisers built by the German Navy. "Irene" was laid down in 1886 at the AG Vulcan shipyard in Stettin, launched in July 1887, and commissioned into the fleet in May 1888. The cruiser was named after Princess Irene of Hesse and by Rhine, sister-in-law of Kaiser Wilhem II. As built, the ship was armed with a main battery of fourteen 15 cm guns and had a top speed of 18 kn .
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Italian ironclad Re Umberto Re Umberto ("King Humbert") was a "Re Umberto"-class ironclad battleship built for the Italian "Regia Marina" (Royal Navy) in the 1880s, the lead ship of her class. She was laid down in July 1884 and launched in October 1888; work proceeded so slowly that she was not finished until February 1893. She was armed with a main battery of four 13.5 in guns and had a top speed of 20.3 kn , though this high speed came at the cost of armor protection.
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SMS König Albert SMS "König Albert" was the fourth vessel of the "Kaiser" class of battleships of the Imperial German Navy. "König Albert"' s keel was laid on 17 July 1910 at the Schichau-Werke dockyard in Danzig. She was launched on 27 April 1912 and was commissioned into the fleet on 31 July 1913. The ship was equipped with ten 30.5 cm guns in five twin turrets, and had a top speed of 22.1 kn . "König Albert" was assigned to the III Battle Squadron and later the IV Battle Squadron of the High Seas Fleet for the majority of her career, including World War I.
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15 cm SK L/40 naval gun The 15 cm SK L/40 was a German naval gun that was used as secondary armament on pre-dreadnought battleships, protected cruisers and armored cruisers of the Imperial German Navy in World War I. It was also used as a coast-defence gun during World War II.
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Imperator Aleksandr II-class battleship The "Imperator Aleksandr II"-class battleships were two battleships built for the Imperial Russian Navy in the 1880s. They were intended to counter the small armored ships of the other Baltic powers. Construction was very prolonged and the ships were virtually obsolescent when completed. They were optimized for ramming.
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H-class battleship proposals The H class was a series of battleship designs for Nazi Germany's "Kriegsmarine", intended to fulfill the requirements of Plan Z in the late 1930s and early 1940s. The first variation, "H-39," called for six ships to be built, essentially as enlarged "Bismarck"-class battleship s with 40.6 cm guns. The "H-41" design improved the "H-39" ship with still larger main guns, with eight 42 cm weapons. Two subsequent plans, "H-42" and "H-43", increased the main battery yet again, with 48 cm pieces, and the enormous "H-44" design ultimately resulted with 50.8 cm guns. The ships ranged in size from the "H-39", which was 277.8 m long on a displacement of 56444 MT , to the "H-44", at 345 m on a displacement of 131000 MT . Most of the designs had a top speed in excess of 30 kn .
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List of heavy cruisers of Germany The German navies of the 1920s through 1945—the Reichsmarine and later Kriegsmarine—built or planned a series of heavy cruisers starting in the late 1920s, initially classified as "Panzerschiffe" (armored ships). Four different designs—the "Deutschland" , D , P , and "Admiral Hipper" class es, comprising twenty-two ships in total—were prepared in the period, though only the three "Deutschland"-class ships and three of the five "Admiral Hipper"-class cruisers were ever built.
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SMS Friedrich der Grosse (1874) SMS "Friedrich der Grosse"  (or "Große"  ) was an armored frigate of the German Kaiserliche Marine. She was the second of three "Preussen"-class ironclad s, in addition to her two sister-ships "Preussen" and "Grosser Kurfürst" . Named for Frederick the Great, she was laid down at the Imperial Dockyard in Kiel in 1871 and completed in 1877. Her main battery of four 26 cm guns was mounted pair of twin gun turrets amidships.
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SMS Prinzess Wilhelm SMS "Prinzess Wilhelm" ("His Majesty's Ship "Princess Wilhelm"") was a protected cruiser of the German Imperial Navy ("Kaiserliche Marine"). She was the second "Irene"-class cruiser ; her only sister ship was  . "Prinzess Wilhelm" was laid down in 1886 at the Germaniawerft shipyard in Kiel, launched in September 1887, and commissioned into the fleet in November 1889. As built, the ship was armed with a main battery of fourteen 15 cm guns and had a top speed of 18 kn .
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Roma-class ironclad The "Roma" class was a pair of ironclad warships built for the Italian "Regia Marina" (Royal Navy) in the 1860s and 1870s. The class comprised two ships, "Roma" and "Venezia" . "Roma" was a broadside ironclad armed with five 10 in and twelve 8 in guns, while "Venezia" was converted into a central battery ship during construction, armed with a much more powerful battery of eighteen 10-inch guns. Neither ship had an eventful career, due in large part to their rapid shift to obsolescence. "Venezia" and "Roma" were withdrawn from service for auxiliary duties in 1880 and 1890, respectively. Both were stricken from the naval register in 1895 and broken up for scrap the following year, "Roma" having been badly damaged in a fire in 1895.
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German battleship Gneisenau Gneisenau was a German capital ship, alternatively described as a battleship and battlecruiser, of Nazi Germany's "Kriegsmarine". She was the second vessel of her class, which included one other ship, "Scharnhorst" . The ship was built at the "Deutsche Werke" dockyard in Kiel; she was laid down on 6 May 1935 and launched on 8 December 1936. Completed in May 1938, the ship was armed with a main battery of nine 28 cm (11 in) C/34 guns in three triple turrets, though there were plans to replace these weapons with six 38 cm (15 in) SK C/34 guns in twin turrets.