The official farewell ceremony for Iran’s late revolutionary leader Ayatollah Ali Khamenei has begun at Tehran’s Grand Mosalla. Foreign guests and religious figures are paying their respects to Khamenei and others killed in a joint U.S.-Israeli attack. The bodies were brought to the Grand Mosalla early Friday, where the public will be allowed to pay tribute over two days.

Among the first foreign visitors were religious and cultural figures from Indonesia and Afghanistan, along with representatives of Iran’s recognized religious minorities. Senior officials and delegates from more than 30 countries, including Russia, China, Pakistan, India, Georgia, and Cuba, have already arrived in Tehran. Around 100 nations are expected to send representatives to the ceremonies.

A family farewell was held Thursday evening, attended by relatives of those killed in the recent 40-day war and staff from the late leader’s office. Iranian officials estimate that between 10 and 20 million people may attend the burial ceremony.