Ottoman Tripolitania, also known as the Regency of Tripoli, was officially ruled by the Ottoman Empire from 1551 to 1912. It corresponded roughly to the northern parts of modern-day Libya in historic Tripolitania and Cyrenaica. It was initially established as an Ottoman province ruled by a pasha (governor) in Tripoli who was appointed from Constantinople, though in practice it was semi-autonomous due to the power of the local Janissaries. From 1711 to 1835, the Karamanli dynasty ruled the province as a de facto hereditary monarchy while remaining under nominal Ottoman suzerainty. In 1835, the Ottomans reestablished direct control over the region until its annexation by Italy in 1912.