The celebrations were held with the full observance of the health protocols in order to prevent the spread of the coronavirus, an-Nabaa news website reported.
The pilgrims also prayed for an end to the COVID-19 pandemic that has plagued the world for months.
Unlike previous years, a limited number of people were allowed to visit to holy mausoleum this year.
Packages of gifts were distributed among the visitors by the Astan (custodianship) of the holy shrine on the auspicious occasion, Fatih al-Kirmani, an official with the Astan said.
The mausoleum was decorated with flowers and flags for Eid al-Ghadir.
The event of Ghadir, or Eid al-Ghadir, is celebrated by Shia Muslims around the world every year. It is among important feasts and happy holidays of Shia Muslims held on the 18th day of Dhul Hijja in the lunar Hijri calendar.
It was the day when according to reports, the Holy Prophet (PBUH) appointed Ali ibn Abi Talib (AS) as his caliph and the Imam after himself following an order from God.