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Suleiman the Magnificent, often regarded as one of the greatest Ottoman sultans, was the ruler Mehmed served as Grand Vizier. During his illustrious reign, Suleiman expanded the Ottoman Empire's territories, patronized arts and literature, and introduced numerous administrative reforms, earning him the title "Kanuni" (the Lawgiver). His reign marked a golden age for the Ottoman Empire, leaving a lasting impact on its history and culture.