The Iranian Revolution, also known as the Islamic Revolution, was a series of events that culminated in the overthrow of the Pahlavi dynasty in 1979. The revolution also led to the replacement of the Imperial State of Iran by the present-day Islamic Republic of Iran, as the monarchical government of Mohammad Reza Pahlavi was superseded by the theocratic government of Ayatollah Ruhollah Khomeini, a religious cleric who had headed one of the rebel factions. The ousting of Pahlavi, the last Shah of Iran, formally marked the end of Iran's historical monarchy.

Ayatollah Ruhollah Musavi Khomeini was an Iranian Islamic revolutionary, politician, and religious leader who served as the first supreme leader of Iran from 1979 until his death in 1989. He was the founder of the Islamic Republic of Iran and the main leader of the Iranian Revolution, which overthrew Mohammad Reza Pahlavi and ended the Iranian monarchy.