Ayatollah Ali Khamenei was supreme leader of Iran from 1989 until his death on Saturday in US and Israeli strikes.
While some like Russian president Vladimir Putin have been strident in their condemnation of the strikes, others have expressed hope that Khamenei's death will give the Iranian people a chance to reshape their country.
Here are some pretty powerful quotes from world leaders on Khamenei's death and what may come next:
Iranian President Masoud Pezeshkian: "The martyrdom of the Supreme Leader at the hands of Israel and the criminal America was a great disaster for our country... America and Israel should know that it will bring them nothing but embarrassment."
Russian president Vladimir Putin:
"Please accept my deep condolences in connection with the murder of the Supreme Leader of the Islamic Republic of Iran, Seyed Ali Khamenei, and members of his family, committed in cynical violation of all norms of human morality and international law."
Pope Leo XIV:
"I address a heartfelt appeal to the parties involved to assume the moral responsibility to stop the spiral of violence before it becomes an irreparable abyss. Stability and peace are not built through mutual threats or through weapons ... but only through reasonable, genuine, and responsible dialogue."
European Commissioner Ursula Von Der Leyen:
"With Khamenei gone, there is renewed hope for the people of Iran. We must ensure that the future is theirs to claim and shape. At the same time, this moment carries a real risk of instability that could push the region into a spiral of violence."
French government spokeperson Maud Bregeon:
"He was responsible for the deaths of thousands of civilians in his country and in the region, so one can only welcome his disappearance. It is now up to the Iranian people to choose their own destiny."
Indonesia's Ulema Muslim Clerical Council:
"The United States, which is playing a central role in managing the Palestinian conflict through the BoP (Board of Peace), faces a major question: is this strategy truly aimed at a just peace, or is it actually strengthening an unequal security architecture and burying Palestinian independence?"
- David Smith and AAP