Abbas I (Persian: عباس یکم, romanized: Abbâs-e Yekom; 27 January 1571 – 19 January 1629), commonly known as Abbas the Great (Persian: عباس بزرگ, romanized: Abbâse Bozorg), was the fifth Safavid shah of Iran from 1588 to 1629. The third son of Shah Mohammad Khodabanda, he is generally considered one of the most important rulers in Iranian history and the greatest ruler of the Safavid dynasty.
Although Abbas would reign over Safavid Iran at its military, political and economic height, he came to the throne during a period of instability in the empire. Under the ineffective rule of his father, the country was riven with discord between the different factions of the Qizilbash army, who killed Abbas' mother and elder brother. Meanwhile, Iran's main enemies, its arch-rival the Ottoman Empire and the Uzbeks, exploited this political chaos to seize territory for themselves. In 1588, one of the Qizilbash leaders, Murshid Quli Khan, overthrew Shah Mohammed in a coup and placed the 16-year-old Abbas on the throne. However, Abbas soon seized power for himself.