The Pahlavi dynasty (Persian: دودمان پهلوی) consisted of two Iranian/Persian monarchs, the father and son Reza Shah Pahlavi (reigned 1925–1941) and Mohammad Reza Shah Pahlavi (reigned 1941–1979).
The Pahlavis came to power after Ahmad Shah Qajar, the last ruler of the Qajar dynasty, proved unable to stop British and Soviet encroachment on Iranian sovereignty, and was consequently overthrown in a military coup, abdicated and ultimately exiled to France. The National Assembly, known as the Majlis, convening as a constituent assembly on 12 December 1925, deposed the young Ahmad Shah Qajar, and declared Reza Shah the new monarch of the Imperial State of Persia. In 1935, Reza Shah instructed foreign embassies to call Persia by its ancient name, Iran.
The Pahlavi dynasty was overthrown in 1979 when Reza Shah's son, Mohammad Reza Shah Pahlavi, was forced into exile by an Islamic Revolution led by Ruhollah Khomeini.
Read more about Pahlavi Dynasty: Establishment, World War II, Cold War, Collapse of The Dynasty, Use of Titles