Mehmed IV, also known as Mehmed the Hunter, was the sultan of the Ottoman Empire from 1648 to 1687. He came to the throne at the age of six after his father was overthrown in a coup. Mehmed went on to become the second-longest-reigning sultan in Ottoman history after Suleiman the Magnificent. While the initial and final years of his reign were characterized by military defeat and political instability, during his middle years he oversaw the revival of the empire's fortunes associated with the Köprülü era. Mehmed IV was known by contemporaries as a particularly pious ruler, and was referred to as gazi, or "holy warrior" for his role in the many conquests carried out during his long reign.

The Köprülü era was a period in which the Ottoman Empire's politics were frequently dominated by a series of grand viziers from the Köprülü family. The Köprülü era is sometimes more narrowly defined as the period from 1656 to 1683, as it was during those years that members of the family held the office of grand vizier uninterruptedly, while for the remainder of the period they occupied it only sporadically.