Mustafa IV, 1778–1808, Ottoman sultan (1807–8), son of Abd al-Hamid I. He was raised to the throne by the reactionary Janissaries who had deposed Mustafa's cousin, Selim III, because they opposed his attempted reforms. When a Turkish army marched on the capital to restore Selim, Mustafa had him murdered, but the rebels killed Mustafa and placed his brother, Mahmud II, on the throne.
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