Pilgrims from across the country, as well as high-ranking Iranian officials along with groups of foreign guests and ambassadors have attended the ceremony at the mausoleum of Imam Khomeini (RA) in southern Tehran.
Supreme Leader of the Islamic Revolution Ayatollah Seyed Ali Khamenei addressed the huge gathering.
On Monday, the head of a committee responsible for foreign guests of the ceremony said that nearly 1,000 guests from 45 countries would participate in the event this year, Tasnim reported.
Every year, large crowds of Iranians from across the country travel to Tehran to attend a commemoration ceremony at Imam Khomeini's shrine to pay tribute to the late founder of the Islamic Republic.
Ayatollah Rouhollah Moussavi Khomeini, better known as Imam Khomeini, spearheaded Iran's 1979 Islamic Revolution, which led to the overthrow of the US-backed Shah of Iran.
Imam Khomeini passed away on June 3, 1989 at the age of 87.