Islam in Malta, although only recently being reintroduced in a sizeable number in the latter half of the 20th century, has had a historically profound impact upon the country—especially its language and agriculture—as a consequence of previous centuries of Muslim control and presence on its islands. Today, the main organizations represented in Malta are the Libyan World Islamic Call Society and the minority Ahmadiyya.
Prior to Muslim rule, Eastern Christianity had been prominent in Malta during the time of Greek-Byzantine rule. The thesis of a Christian continuity in Malta during Arab rule, despite popular, is historically unfounded.
Islam is believed to have been introduced to Malta when the North African Aghlabids, first led by Halaf al-Hadim and later by Sawada ibn Muhammad, conquered the islands from the Byzantines, after arriving from Sicily in 870 (as part of the wider Arab–Byzantine wars). However, it has also been argued that the islands were occupied by Muslims earlier in the 9th, and possibly 8th, century. The Aghlabids established their capital in Mdina. The old Roman fortification, later to become Fort St Angelo, was also extended.
According to the Arab chronicler and geographer Muhammad bin Abd al-Munim al-Himyari (author of Kitab al-Rawd al-Mitar), following the Muslim attack and conquest, Malta was practically uninhabited until it was recolonised by Muslims from Sicily in 1048–1049, or possibly several decades earlier. As recognised by the acclaimed Maltese historial Godfrey Wettinger, the Arab conquest broke any continuity with previous population of the island. This is also consistent with Joseph Brincat’s linguistic finding of no further sub-stratas beyond Arabic in the Maltese language, a very rare occurrence which may only be explained by a drastic lapse between one period and the following.
Malta returned to Christian rule with the Norman conquest in 1127. It was, with Noto on the southern tip of Sicily, the last Arab stronghold in the region to be retaken by the resurgent Christians.