Agha Mohammad Khan made Tehran his capital as he built a new, centralized state. This choice helped the Qajars govern from a strategic location in northern Iran and shaped Iran’s political center for the centuries that followed.
After decades of political fragmentation following earlier dynasties’ decline, Agha Mohammad Khan (a leader of the Qajar tribe) consolidated power. His rise is commonly dated to 1789, marking the start of Qajar rule over Iran.
In 1796, Agha Mohammad Khan formally took the royal title, completing his transition from warlord to monarch. The coronation symbolized the reuniting of much of Iran under one dynasty after years of civil conflict.
Agha Mohammad Khan was assassinated in 1797 during a campaign in the Caucasus. His death forced a succession and tested whether the new dynasty could remain stable beyond its founder.
War with the Russian Empire broke out in 1804 as Russia expanded in the Caucasus, a region Iran considered part of its historical sphere. The conflict strained Qajar resources and set up major territorial losses.
The 1813 Treaty of Gulistan ended the 1804–1813 war with Russia. Qajar Iran accepted Russian control over large areas in the South Caucasus, a major blow to prestige and border security.
After another war with Russia (1826–1828), the Treaty of Turkmenchay forced Iran to cede more Caucasus territory and accept expanded Russian influence. These defeats hardened public awareness of Iran’s military and administrative weaknesses.
In 1857, Iran signed the Treaty of Paris with Great Britain after conflict linked to Herat (in today’s Afghanistan). Iran agreed to withdraw from Herat and effectively recognized Afghanistan’s separate status, showing Britain’s leverage in the region.
In 1890, the shah granted a major tobacco monopoly to a British subject, affecting farmers, merchants, and consumers. The resulting boycott and protests—supported by leading clerics—became a landmark moment of organized resistance to foreign economic concessions.
Naser al-Din Shah was assassinated in 1896 at the Shah Abdol-Azim shrine near Tehran. The killing highlighted deep dissatisfaction with autocratic rule and helped push politics toward demands for stronger limits on royal power.
The D’Arcy concession granted a foreign entrepreneur exclusive rights to explore for and produce oil across most of Iran (excluding some northern provinces) for decades. It later became central to Iran’s financial and sovereignty disputes because oil revenues and control were heavily influenced by external interests.
In 1906, Mozaffar ad-Din Shah granted Iran’s first constitution (the Fundamental Law), creating a framework for a parliament (the Majles). The First Majles opened soon after, marking a shift from absolute monarchy toward constitutional government.
In 1907, Britain and Russia signed an agreement that mapped out their respective zones of influence in Iran, along with arrangements concerning Afghanistan and Tibet. For many Iranians, it symbolized how foreign powers could shape Iran’s politics and economy despite constitutional reforms.
In 1908, a major oil field was discovered at Masjed Soleiman in southwestern Iran. This discovery tied Iran more tightly to global industrial and strategic competition, especially as navies and industries shifted toward oil power.
In June 1908, forces linked to Mohammad Ali Shah attacked the parliament building with artillery, suppressing constitutionalist leaders. The event showed that constitutional government was still contested and could be reversed by force.
In 1909, the Anglo-Persian Oil Company was formed to develop and market Iranian oil. Over time, foreign ownership and state backing for the company deepened Iranian debates about concessions, revenue-sharing, and political independence.
In February 1921, a coup in Tehran brought a new government to power and elevated Reza Khan, a military commander, as the key figure in national politics. The coup weakened the Qajar state further and began a transition toward a more centralized, military-backed government.
In late 1925, Iran’s parliament amended the constitution to replace the Qajars with the Pahlavi dynasty. This decision formally ended Qajar rule (1789–1925) and closed a period marked by territorial losses, growing foreign pressure, and a long struggle over constitutional government.
Qajar Dynasty (1789–1925)