Royal Italien was a 74-gun built for the French Navy during the first decade of the 19th century. Completed in 1813, she played a minor role in the Napoleonic Wars.
Royal Italien was one of the of the Téméraire class that was specially intended for construction in some of the shipyards in countries occupied by the French, where there was less depth of water than in the main French shipyards. The ships had a length of , a beam of and a depth of hold of . The ships displaced 2,781 tonneaux and had a mean draught of . They had a tonnage of 1,381 port tonneaux. Their crew numbered 705 officers and ratings during wartime. They were fitted with three masts and ship rigged.
The muzzle-loading, smoothbore armament of the Téméraire class consisted of twenty-eight 36-pounder long guns on the lower gun deck and thirty 18-pounder long guns on the upper gun deck. The ships ordered in 1803âÂÂ1804 were intended to mount sixteen 8-pounder long guns on their forecastle and quarterdeck, plus four 36-pounder obusiers on the poop deck (). Later ships were intended to have fourteen 8-pounders and ten 36-pounder carronades without any obusiers, but the numbers of 8-pounders and carronades actually varied between a total of 20 to 26 weapons.
Royal Italien was laid down on 26 December 1806 in the Venetian Arsenal, launched on 15 August 1812 and completed in November 1813 The ship was surrendered to the Austrian Empire at the fall of Venice in April 1814, and commissioned in the Austrian Navy as Reale Italiano. In 1825, she was razéed into a frigate. She was eventually broken up in 1838.