Iran held a state funeral in Tehran on Monday for Supreme Leader Ali Khamenei, who led the Islamic Republic for more than 35 years following the death of its founder, Ayatollah Ruhollah Khomeini, in 1989. The ceremony drew enormous crowds in the capital and was broadcast widely, marking one of the most significant political moments in Iran in decades.

The funeral underscored the magnitude of the transition now facing the Iranian government. Khamenei was the central authority overseeing Iran's military, judiciary, foreign policy, and nuclear program, and his death leaves a considerable power vacuum at the top of the theocratic state.

Succession speculation has quickly centered on Mojtaba Khamenei, the late Supreme Leader's son, who has cultivated influence within Iran's powerful Revolutionary Guard and clerical establishment. Analysts caution, however, that the formal selection of a new Supreme Leader rests with Iran's Assembly of Experts, and the outcome remains uncertain.

The transition comes at a fraught moment for Iran, which has faced sustained economic pressure from international sanctions, domestic unrest in recent years, and ongoing tensions with the United States and Israel. How the country navigates the leadership change is expected to have significant implications for regional stability and nuclear negotiations.

Inside Iran, state media portrayed the funeral as a moment of national mourning and unity. Outside its borders, governments and analysts are closely watching for signals about the direction of Iranian policy under whoever ultimately assumes the role of Supreme Leader.