ISTANBUL — Since the lavish, feel-good Turkish epic “Conquest 1453” had its premiere this year, its tale of the taking of Constantinople by the 21-year-old Sultan Mehmet II has become the highest-grossing film in Turkey’s history, released in 12 countries across the Middle East and in Germany and the United States. But its biggest impact may be the cultural triumphalism it has magnified at home.

“Conquest 1453” (known as “Fetih 1453” in Turkish) has spawned a television show with the same title and has encouraged clubs of proud Turks to re-enact battles from the empire’s glory days and even dress up as sultans and Ottoman nobles. The producers of “Once Upon a Time Ottoman Empire Mutiny,” a television series about the 18th-century insurrection against Sultan Ahmet Khan III, said they planned to build a theme park where visitors will be able to wander through a reproduction of Ottoman-era Istanbul and watch sword fights by stuntmen. At least four new films portray the battle of Gallipoli, the bloody World War I face-off between the Ottomans and Allied forces over the straits of Dardanelles and one of the greatest victories of modern Turkey. The coming “In Gallipoli” even includes Mel Gibson starring as a British commander.

The Ottoman period, particularly during the 16th and 17th centuries, was marked by geopolitical dominance and cultural prowess, during which the sultans claimed the spiritual leadership of the Muslim world, before the empire’s slow decline culminated in World War I. For years the period was underplayed in the history taught to schoolchildren, as the new Turkish Republic created by Mustafa Kemal Ataturk in 1923 sought to break with a decadent past.