Fatimah, daughter of the Islamic prophet Muhammad, dies, with her cause of death being a controversial topic among the Sunni Muslims and Shia Muslims.

Fatima bint Muhammad, commonly known as Fatima al-Zahra', was the daughter of the Islamic prophet Muhammad and his wife Khadija. Fatima's husband was Ali, the fourth of the Rashidun caliphs and the first Shia imam. Fatima's sons were Hasan and Husayn, the second and third Shia imams, respectively. Fatima has been compared to Mary, mother of Jesus, especially in Shia Islam. Muhammad is said to have regarded her as the best of women and the dearest person to him. She is often viewed as an ultimate archetype for Muslim women and an example of compassion, generosity, and enduring suffering. It is through Fatima that Muhammad's family line has survived to this date. Her name and her epithets remain popular choices for Muslim girls.

Muhammad was an Arab religious, military and political leader and the founder of Islam. According to Islam, he was a prophet who was divinely inspired to preach and confirm the monotheistic teachings of Adam, Noah, Abraham, Moses, Jesus, and other prophets. He is believed by Muslims to be the Seal of the Prophets, and along with the Quran, his teachings and normative examples form the basis for Islamic religious belief.

Sunni Islam is the largest branch of Islam and the largest religious denomination in the world. It holds that Muhammad did not appoint any successor and that his closest companion Abu Bakr rightfully succeeded him as the caliph of the Muslim community, being appointed at the meeting of Saqifa. This contrasts with the Shia view, which holds that Muhammad appointed Ali ibn Abi Talib as his successor. Nevertheless, Sunnis revere Ali, along with Abu Bakr, Umar and Uthman as 'rightly-guided caliphs'.

Shia Islam is the second-largest branch of Islam. It holds that Muhammad designated Ali ibn Abi Talib as both his political successor (caliph) and as the spiritual leader of the Muslim community (imam). However, his right is understood to have been usurped by a number of Muhammad's companions at the meeting of Saqifa, during which they appointed Abu Bakr as caliph instead. As such, Sunni Muslims believe Abu Bakr, Umar, Uthman and Ali to be 'rightly-guided caliphs', whereas Shia Muslims regard only Ali as the legitimate successor.