One of the world's longest-lasting monarchies, the Iranian monarchy went through many transformations over the centuries, from the days of Persia to the creation of what is now modern day Iran.
The modern Iranian monarchy was established in 1502 after the Safavid Dynasty came to power under Shah Ismail I, and ended the so-called "fourth era" of political fragmentation. The monarchy was abolished in 1979 when a revolution led by Ayatollah Khomeini forced Shah Mohammed Reza Pahlavi into exile, and established an Islamic Republic in its place.