The Harem was one of the most important powers of the Ottoman court. It was ruled by the Valide Sultan (Sultana Mother), mother of the reigning sultan, who held supreme power over the Harem and thus a powerful position in the court. On occasion, the Valide Sultan would become involved in state politics and through her influence could diminish the power and position of the sultan. For a period of time beginning in the 16th century and extending into the 17th, the women of the Harem effectively controlled the state in what was termed the "Sultanate of Women" ("Kadınlar Saltanatı").