Umar

Umar
عُمَر
Umar; عُمَر
Amir al-Mu'minin; Al-Fārūq
	Calligraphic seal featuring Umar's name, on display in the Hagia Sophia, Istanbul, Turkey.
2nd Caliph of the Rashidun Caliphate
Reign	23 August 634 – c. 6 November 644; (10 years, 73 days)
Predecessor	Abu Bakr
Successor	Uthman
Born	c. 584; Mecca, Hejaz, Arabia
Died	c. 6 November 644 (c. 26 Dhu'l-Hijja 23 AH) (aged 60–61); Medina, Rashidun Caliphate
Burial	Prophet's Mosque, Medina
Spouse	Zaynab bint Maz'un; Umm Kulthum bint Jarwal; Qurayba bint Abi Umayya; Jamila bint Thabit; Atika bint Zayd; Umm Hakim bint al-Harith; Umm Kulthum bint Ali;
Issue	Hafsa; Abd Allah; Ubayd Allah; Asim; Zayd;
Tribe	Quraysh (Banu Adi)
Father	Al-Khattab ibn Nufayl
Mother	Hantamah bint Hisham
Religion	Islam

Umar ibn al-Khattab (Arabic: عُمَر بْن ٱلْخَطَّاب, romanized: ʿUmar ibn al-Khaṭṭāb; c. 584 – 644) was the second Rashidun caliph, ruling from August 634 until his assassination in 644. He succeeded Abu Bakr (r. 632–634) and is regarded as a senior companion and father-in-law of the Islamic prophet Muhammad.

The conversion of Umar to Islam is presented in Sunni Islam as a highly dramatic, epic, and prototypical story of embrace; initially, Umar was opposed to Muhammad, a distant Qurayshite kinsman, even setting out to kill him with his sword. However, after a spiritual break, he converted to Islam in 616, becoming the first Muslim to dare to pray openly in the Kaaba, an act followed by other Muslims. He participated in nearly all of Muhammad's battles and expeditions, and Muhammad conferred upon him the title al-Fārūq ("the Distinguisher") for his sound judgement. After Muhammad's death in June 632, Umar pledged allegiance to Abu Bakr as the first caliph and served as his chief adviser. In 634, shortly before his death, Abu Bakr nominated Umar as his successor. During Umar's reign, the caliphate expanded at an unprecedented rate. His campaigns against the Sasanian Empire resulted in the rapid conquest of Persia within two years (642-644), and more than two-thirds of the Byzantine Empire. Umar was assassinated by the Persian slave Abu Lu'lu'a Firuz in 644.

Umar is widely credited with expanding the Islamic world beyond Arabia and introducing the Hijri Calendar Historians generally regard him as one of the most powerful and influential Muslim caliphs in history. According to Jewish tradition, Umar lifted the Christian ban on Jews entering Jerusalem and permitted them to worship there. In Sunni Islam, Umar is revered as a just ruler and a supreme model for Islamic virtues. In Shia Islam, however, he is viewed negatively.