stylistic:style_transfer, structural:summarization
Middle Ages

During the 7th century, Muslim Arabs conquered Syria from the Byzantines, incorporating the region, including modern-day Lebanon, under the Islamic Caliphate. In the era of Uthman 's caliphate (644–656), Islam gained significant influence in Damascus, led by Mu'awiya, a relative of Uthman, serving as the governor. Mu'awiya sent forces to the coastal region of Lebanon, prompting conversions to Islam among the coastal population. However, the mountainous areas retained their Christian or other cultural practices. Despite Islam and Arabic becoming officially dominant, the population's conversion from Christianity and Syriac language was gradual. The Maronite community, in particular, managed to maintain a large degree of autonomy despite the succession of rulers over Lebanon and Syria. The relative (but not complete) isolation of the Lebanese mountains meant the mountains served as a refuge in the times of religious and political crises in the Levant. As such, the mountains displayed religious diversity and the existence of several well-established sects and religions, notably, Maronites, Druze, Shiite Muslims, Ismailis, Alawites and Jacobites.

After the Islamic conquest, Mediterranean trade declined for three centuries due to conflicts with the Byzantines. The ports of Tyre, Sidon, Beirut, and Tripoli struggled to recover, sustaining small populations under Umayyad and Abbasid rule. Christians and Jews were often obligated to pay the jizya, or poll tax levied on non-Muslims. During the 980s, the Fatimid Caliphate took control of the Levant, including Mount Lebanon, resulting in the rejuvenation of Mediterranean trade along the Lebanese coast through renewed connections with Byzantium and Italy. This resurgence saw Tripoli and Tyre flourishing well into the 11th century, focusing on exports such as textiles, sugar, and glassware.

During the 11th century, the Druze religion emerged from a branch of Shia Islam. The new religion gained followers in the southern portion of Mount Lebanon. The southern portion of Mount Lebanon was ruled by Druze feudal families till the early 14th century. The Maronite population increased gradually in Northern Mount Lebanon and the Druze have remained in Southern Mount Lebanon until the modern era. Keserwan, Jabal Amel and the Beqaa Valley was ruled by Shia feudal families under the Mamluks and the Ottoman Empire. Major cities on the coast, Sidon, Tyre, Acre, Tripoli, Beirut, and others, were directly administered by the Muslim Caliphs and the people became more fully absorbed by the Arab culture.

Following the fall of Roman Anatolia to the Muslim Turks, the Byzantines put out a call to the Pope in Rome for assistance in the 11th century. The result was a series of wars known as the Crusades launched by the Franks from Western Europe to reclaim the former Byzantine Christian territories in the Eastern Mediterranean, especially Syria and Palestine (the Levant). The First Crusade succeeded in temporarily establishing the Kingdom of Jerusalem and the County of Tripoli as Roman Catholic Christian states along the coast. These crusader states made a lasting impact on the region, though their control was limited, and the region returned to full Muslim control after two centuries following the conquest by the Mamluks.

Among the most lasting effects of the Crusades in this region was the contact between the Franks (i.e., the French) and the Maronites. Unlike most other Christian communities in the Eastern Mediterranean, who swore allegiance to Constantinople or other local patriarchs, the Maronites proclaimed allegiance to the Pope in Rome. As such the Franks saw them as Roman Catholic brethren. These initial contacts led to centuries of support for the Maronites from France and Italy, even after the fall of the Crusader states in the region.