Paralia to form the new province of Syria Palaestina, and Jerusalem was renamed "Aelia Capitolina". Some scholars view these actions as an attempt to disconnect the Jewish people from their homeland, but this theory is debated. Between 259 and 272, the region fell under the rule of Odaenathus as King of the Palmyrene Empire. Following the victory of Christian emperor Constantine in the Civil wars of the Tetrarchy, the Christianization of the Roman Empire began, and in 326, Constantine's mother Saint Helena visited Jerusalem and began the construction of churches and shrines. Palestine became a center of Christianity, attracting numerous monks and religious scholars. The Samaritan Revolts during this period caused their near extinction. In 614 CE, Palestine was annexed by another Persian dynasty; the Sassanids, until returning to Byzantine control in 628 CE. Early Muslim period Palestine was conquered by the Rashidun Caliphate, beginning in 634 CE. In 636, the Battle of Yarmouk during the Muslim conquest of the Levant marked the start of Muslim hegemony over the region, which became known as the military district of Jund Filastin within the province of Bilâd al-Shâm (Greater Syria). In 661, with the Assassination of Ali, Muawiyah I became the Caliph of the Islamic world after being crowned in Jerusalem. The Dome of the Rock, completed in 691, was the world's first great work of Islamic architecture. The majority of the population was Christian and was to remain so until the conquest of Saladin in 1187. The Muslim conquest apparently had little impact on social and administrative continuities for several decades. The word 'Arab' at the time referred predominantly to Bedouin nomads, though Arab settlement is attested in the Judean highlands and near Jerusalem by the 5th century, and some tribes had converted to Christianity. The local population engaged in farming, which was considered demeaning, and were called Nabaț, referring to Aramaic-speaking villagers. A ḥadīth, brought in the name of a Muslim freedman who settled in Palestine, ordered the Muslim Arabs not to settle in the villages, "for he who abides in villages it is as if he abides in graves". The Umayyads, who had spurred a strong economic resurgence in the area, were replaced by the Abbasids in 750. Ramla became the administrative centre for the following centuries, while Tiberias became a thriving centre of Muslim scholarship. From 878, Palestine was ruled from Egypt by semi-autonomous rulers for almost a