Muhammad Jahan Pahlavan

Nusrat al-Din Muhammad ibn Ildeniz (), better known as Muhammad Jahan-Pahlavan (, "Muhammad, the champion of the world"), was the ruler ("atabeg") of the Eldiguzids from 1175 to 1186. He was the son and successor of Eldiguz, and was later succeeded by his brother Qizil Arslan.
After the death of Shams al-Din Eldiguz, in 1175, the Seljuq Sultan Arslan Shah tried to escape from the yoke of the Grand Atabeg of Azerbaijan but failed, and was poisoned to death by Shams ad-Din's son, the new Grand Atabeg Muhammad Jahan Pahlavan (1174–1186). Pahlavan transferred his capital from Nakhchivan to Hamadan in western Iran, and made his younger brother, Qizil Arslan Uthman, the ruler of Azerbaijan. In 1174, Qizil Arslan captured Tabriz, which subsequently became his capital.
Jahan Pahlavan suppressed all rebellious emirs and appointed faithful mamluks to key positions. He apportioned each of them any region or town as Iqta. The twelve years of his rule are considered the most peaceful period of the state's existence. Under his reign the central power was strengthened and no foreign enemy invaded the territory belonging to the Atabegs. Friendly relations with Khwarazm Shahs, the rulers of Central Asia, were founded. All those facts had positive influence on the development of science, handicraft, trade and arts.