Prophet Muhammad was an Arab religious, political, and social leader. He is credited with founding the world's second-largest religion, Islam. He is believed to have been sent to preach and confirm the teachings of other prophets, such as Adam, Abraham, Moses, and Jesus. He is also believed to have received revelations from God, which form the verses of the Quran.
Ali ibn Abi Talib was the son-in-law and a cousin of the Islamic prophet Muhammad. He played a key role in establishing the Muslim community by participating in almost all the battles that the nascent community fought. He ruled as the fourth caliph and is revered by Shia Muslims even today.
Abu Bakr was a companion and father-in-law of the founder of Islam, Muhammad. After Muhammad's death, Bakr played an important role in leading the Muslims as the first Rashidun Caliph. Under Abu Bakr’s leadership, the Muslim state expanded over the entire Arabian peninsula. Abu Bakr's work during his reign eventually led to the Muslim conquests of the Levant and Persia.
Ibn Saud, or King Abdulaziz, was the founder and first monarch of Saudi Arabia. He oversaw the discovery of petroleum and the subsequent oil production in his country. He annexed the kingdoms of central and northern Arabia and ruled for over 20 years. He sired countless children, including 45 sons.
Hasan ibn Ali was the grandson of Prophet Muhammad, the founder of Islam. He was born to Muhammad's daughter Fatimah and Ali. Hasan is often referred to as the second Imam by the Shia Muslims. He was known for his kindness, knowledge, bravery, and tolerance.