Mehmed IV (Ottoman Turkish: محمد رابع Meḥmed-i rābi‘; also known as Avcı Mehmed, Mehmed the Hunter; January 2, 1642 – January 6, 1693) was the Sultan of the Ottoman Empire from 1648 to 1687. Taking the throne at age six, his reign was significant as he changed the nature of the Sultan's position forever by giving up most of his executive power to his Grand Vizier. While his early reign saw a short-lived revival of the Empire's fortunes, which saw the recapture of the Aegean islands and successful campaigns against Poland and Transylvania, things changed dramatically under his vizier, Kara Mustafa Pasha, who as less capable than his predecessors. Kara Mustafa's siege of Vienna ultimately led to a route at the hands of Poland and its allies, leading to a years long Ottoman withdrawal back to