The Lors are an ethnic group that are closely related to Kurds yet they have considered themselves separate from them for the past 1,000 years. Although most Lors are Shia Muslim, a significant minority of them practice a religion called Yareson, a medieval Iranian religion who has its roots in pre-Islamic Zoroastrianism. The Iranian regime has attempted to change their traditional clothing and to place restrictions on traditional celebrations where Lor men and women dance together.