Hadschar-Gebirge
The Imamate of Oman () refers to a historical state within the "Oman proper" () in the present-day Al Hajar Mountains in Sultanate of Oman. The capital of the Imamate alternated historically between Rustaq and Nizwa. The Imamate's territory extended north to Ibri and south to Alsharqiyah region and the Sharqiya Sands. The Imamate was bounded from the east by the Al Hajar Mountains and from the west by the Rub' al Khali (Empty Quarter) desert. The Al Hajar Mountains separated the Imamate of Oman from the Sultanate of Muscat. The elected Imam (ruler) resided in the capital, and Walis (governors) represented the Imamate in its different regions.