Arba'een, is one of the largest pilgrimage gatherings on Earth, in which over 10 million people go to the city ofKarbalainIraq.Arba'een, or Chehlom, is aShiaMuslim religious observation that occurs40days after theDay of Ashura. It commemorates themartyrdomofHussein bin Ali, the grandson of the ProphetMuhammadwhich falls on the 20th day of the month ofSafar.
Pictures below showArba'een mourning rituals in Iran.
