Who were the key leaders of the ottoman empire

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The Ottoman Turks set up a formal government and expanded their territory under the leadership of Osman I, Orhan, Murad I and Bayezid I. In 1453, Mehmed II the Conqueror led the Ottoman Turks in seizing the ancient city of Constantinople, the Byzantine Empire's capital.

answer: 25.8 years old or 25 years old

there is no photo, therefore i can not answer your question.