The siege of Emesa was laid by the forces of Rashidun Caliphate from December 635 up until March 636. This led to the Islamic conquest of Emesa, which was a major trading city of the Byzantine Empire in the Levant.
Khalid ibn al-Walid mosque in Homs
The Rashidun Caliphate was the first caliphate to succeed the Islamic prophet Muhammad. It was ruled by the first four successive caliphs of Muhammad after his death in 632 CE. During its existence, the empire was the most powerful economic, cultural, and military force in West Asia and Northeast Africa.
Coin of the Rashidun Caliphate, circa 647–670, imitating Byzantine coins, featuring a Byzantine figure (Constans II) holding a scepter and globus cruciger
Tombs of caliphs: Abu Bakr and Umar (right), Medina, present-day Kingdom of Saudi Arabia
Muhammad's widow, Aisha, battling the fourth caliph Ali in the Battle of the Camel (16th-century miniature from a copy of the Siyer-i Nebi)
Illustration of the Battle of Siffin, from a 14th-century manuscript of the Tarikh-i Bal'ami