Al-Mahdi Billah was a prominent figure in Islamic history, particularly within the Shia tradition. He is often regarded as the twelfth and final Imam, believed by Shia Muslims to be in occultation and will reappear to bring justice and peace to the world. His lineage traces back to the Prophet Muhammad, making him a significant religious leader. Born in 869 CE in Samarra, Iraq, Al-Mahdi Billah is considered a symbol of hope and divine guidance. His absence is seen as a test of faith for believers, who await his return to establish a just society. His teachings emphasize the importance of faith, justice, and community.