Mehmet IV,1641–92, Ottoman sultan (1648–87). He was proclaimed sultan of the Ottoman Empire (Turkey) by the corps of JanissariesJanissaries
[Turk.,=recruits], elite corps in the service of the Ottoman Empire (Turkey). It was composed of war captives and Christian youths pressed into service; all the recruits were converted to Islam and trained under the strictest discipline.
..... Click the link for more information. after the deposition and murder of his father, Sultan Ibrahim. Disorder and corruption continued until the KöprülüKöprülü
, family of humble Albanian origin, several members of which served as grand vizier (chief executive officer) in the Ottoman Empire. The name is also spelled Kiuprili, Koprili, and Kuprili.
..... Click the link for more information. family obtained (1656) the office of grand vizier (chief executive officer) and restored order. However, the empire suffered severe setbacks. Algiers freed itself (1669) from Ottoman suzerainty. In 1683 the Turks, in alliance with the Hungarian ThökölyThököly, Imre
, 1656–1705, Hungarian rebel, of a noble family of N Hungary. His father, Stephen Thököly, took an important part in the unsuccessful conspiracy of Francis I Rákóczy and Peter Zrinyi against Holy Roman Emperor Leopold I and
..... Click the link for more information. , besieged Vienna but were repulsed by King John III of Poland. Turkish weakness being apparent, a Holy League was formed to carry the war into Ottoman territory. After the Turkish defeat (1687) at Mohacs by Charles V of Lorraine, Muhammad was deposed. His brother, Sulayman II, succeeded him.