Khuza’a became Christians with them according to Abu al-Faraj al-Isfahani. The earliest indications of Christianity in Mecca is the Christian cemetery outside the Medina towards the well of 'Anbasa, confirmed by al-Maqdisi, as well as the conversion to Christianity by some members of the Quraish. Islamic Era Following the fall of large portions of former Byzantine and Sasanian provinces to the Arab armies, a large indigenous Christian population of varying ethnicities came under Arab Muslim dominance. Historically, a number of minority Christian sects were persecuted as heretic under Byzantine rule (such as non-Chalcedonians). The Islamic conquests set forth two processes affecting these Christian communities: the process of Arabization, causing them gradually to adopt Arabic as a spoken, literary, and liturgical language (often alongside their ancestral tongues), and the much slower, yet persistent process of Islamization. As Muslim army commanders expanded their empire and attacked countries in Asia, North Africa and southern Europe, they would offer three conditions to their enemies: convert to Islam, pay jizya (tax) every year, or face war to death. Those who refused war and refused to convert were deemed to have agreed to pay jizya. As "People of the Book", Christians in the region were accorded certain rights under Islamic law to practice their religion (including having Christian law used for rulings, settlements or sentences in court). In contrast to Muslims, who paid the zakat tax, they paid the jizya, an obligatory tax. The jizya was not levied on slaves, women, children, monks, the old, the sick, hermits, or the poor. In return, non-Muslim citizens were permitted to practice their faith, to enjoy a measure of communal autonomy, to be entitled to Muslim state's protection from outside aggression, to be exempted from military service, and to be exempted from the zakat. Like Arab Muslims, Arab Christians refer to God as "Allah". As with the Christians of Malta, this practice is distinguished from the Islamic use of the word "Allah" which refers to the personal name of God in that faith. The use of the term Allah in Arab churches predates Islam. During the Islamic Golden Age, Christians contributed to the Islamic civilization in various fields, and the institution known as the House of Wisdom employed Christian scholars to translate works into Arabic and to develop new knowledge. Modern Era Arab Christians have always been the go-between the Islamic world and the Christian West, mainly down to