page_title: Regioni-class cruiser
section_title: Armament and armor
hierarchical_section_title: Regioni-class cruiser / Design / Armament and armor
caption_attribution_description: The light cruiser Puglia, at the Vittoriale degli italiani, in Gardone Riviera, on Lake Garda, Brescia, Italy.
context_page_description: The Regioni class was a group of six protected cruisers built for the Italian Regia Marina 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-centimeter guns and six 12 cm guns.
  The ships served in a variety of roles throughout their careers, including scouts for the main fleet, colonial cruisers, and representatives of Italy at major foreign events. Elba observed the Russo-Japanese War, including the Battle of Chemulpo Bay in 1904, where she picked up Russian survivors. Lombardia was converted into a depot ship for submarines in 1906. Elba and Liguria were equipped with observation balloons in 1907–1908. In 1910, Umbria was sold to Haiti and renamed Consul Gostrück, though she quickly sank under the care of her inexperienced crew.
context_section_description: All six ships were armed with a main battery of four 15 cm (5.9 in) L/40 guns mounted singly, with two side by side forward and two side by side aft. Six 12 cm (4.7 in) L/40 guns were placed between them, with three on each broadside. The ships' light armament varied. All of the ships save Lombardia were equipped with eight 57 mm (2.2 in) guns, which had an additional two of these guns. Umbria was also equipped with one 75 mm (3 in) gun and nine 37 mm (1.5 in) guns, while Puglia had eight of the 37 mm guns and Elba had six of them. Liguria and Etruria only had two 37 mm guns, and Lombardia had none. All six ships had a pair of machine guns and two 450 mm (17.7 in) torpedo tubes.
  The ships all had their armament repeatedly revised throughout their careers. By 1905, each ship had had two of the 15 cm guns replaced with two additional 12 cm guns, and their secondary battery was standardized at eight 57 mm guns and eight 37 mm guns, with the exception of Puglia, which had six and two guns, respectively. Puglia had also had her two torpedo tubes removed by this point. In 1914, Liguria had all of her 15 cm guns removed, along with six of the 37 mm guns.  Her armament was reduced further in 1917 when she was refitted as a minelayer; at this point, she mounted only six 12 cm guns and two 37 mm guns. Starting in 1915, Etruria and Lombardia were equipped with only six 12 cm guns, six 57 mm guns for Etruria and eight for Lombardia, two 37 mm guns, and their torpedo tubes. At the same time, Elba was rearmed with six 12 cm guns, two 37 cm guns, and one machine gun; she retained her torpedo tubes.
  The first five ships were protected by a 50 mm (2 in) thick deck, and their conning tower had 50 mm thick sides. Puglia had a deck that was only 25 mm (1 in) thick, though she had the same thickness of armor on her conning tower.
caption: One of Puglia's light guns
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