Sher Shah Suri, born Farīd Khān, was the founder of the Suri Empire in India, with its capital in Sasaram in modern-day Bihar. He introduced the currency of rupee. An ethnic Afghan ruler, Sher Shah took control of the Mughal Empire in 1540. After his accidental death in 1545, his son Islam Shah became his successor.
He first served as a private before rising to become a commander in the Mughal army under Babur and then the governor of Bihar. In 1537, when Babur's son Humayun was elsewhere on an expedition, Sher Shah overran the state of Bengal and established the Suri dynasty. A brilliant strategist, Sher Shah proved himself as a gifted Muslim administrator as well as a capable general. His reorganization of the empire laid the foundations for the later Mughal emperors, notably Akbar, son of Humayun.
During his five-year rule from 1540 to 1545, he set up a new economic and military administration, issued the first Rupiya from "Tanka" and organized the postal system of the Indian Subcontinent.
Some of his strategies and contributions were later idolized by the Mughal emperors, most notably Akbar.