This article provides the list of Maraji (plural of Marja, the supreme legal authority or the source of emulation), followed by Twelver (also known as Imamiyyah) Shia Muslims around the world. The concept of a Marja-i Taqlid (lit. source of emulation) is central to Usuli Shi'a Islam. Marja-i Taqlids provide religious interpretations on matters of law and rituals. Ideally, the most just and knowledgeable specialist in the field of the Islamic law should become recognized throughout the Muslim world as the Marja-i Taqlid. In practice however this rarely happens and there are several marja taqlids among whom an individual is free to choose and emulate.