History of the Mediterranean region
Early Islamic period

Another power was rising in the east, that of Islam, whilst the Eastern Roman Empire and Sassanid Persian empires were both weakened by centuries of stalemate warfare during the Roman–Persian Wars. In a series of rapid Muslim conquests, the Arab armies, motivated by Islam and led by the Caliphs and skilled military commanders such as Khalid ibn al-Walid, swept through most of the Middle East; reducing Byzantine lands by more than half and completely engulfing the Persian lands.

The Arab invasions disrupted the trade relations between Western and Eastern Europe while cutting the trade route with Oriental lands. This however had the indirect effect of promoting the trade across the Caspian Sea. The export of grains from Egypt was re-routed towards the Eastern world. Oriental goods like silk and spices were carried from Egypt to ports like Venice and Constantinople by sailors and Jewish merchants. The Viking raids further disrupted the trade in western Europe and brought it to a halt. However, the Norsemen developed the trade from Norway to the White Sea, while also trading in luxury goods from Spain and the Mediterranean. The Byzantines in the mid-8th century retook control of the area around the north-eastern part of the Mediterranean. Venetian ships from the 9th century armed themselves to counter the harassment by Arabs while concentrating trade of oriental goods at Venice.

The powerful and long-lived Bulgarian Empire was the main European rival in the region of the Mediterranean Balkan peninsula between the 7th and the 14th centuries, creating an important cultural, political, linguistic and religious legacy during the Middle Ages.

In Anatolia, the Muslim expansion was blocked by the still capable Byzantines with the help of the Tervel of Bulgaria. The Byzantine provinces of Roman Syria, North Africa, and Sicily, however, could not mount such a resistance, and the Muslim conquerors swept through those regions. At the far west, they crossed the sea taking Visigothic Hispania before being halted in southern France by the Franks. At its greatest extent, the Arab Empire controlled three-quarters of the Mediterranean coast, and fostered an economic interrelationship between the Indian Ocean and Mediterranean. Much of North Africa became a peripheral area to the main Muslim centers in the Middle East, but Al Andalus and Morocco soon broke from this distant control and became highly advanced societies in their own right.

Between 831 and 1071, the Emirate of Sicily was one of the major centres of Islamic culture in the Mediterranean. After its conquest by the Christian Normans, the island developed its own distinct culture with the fusion of Latin and Byzantine influences. Palermo remained a leading artistic and commercial centre of the Mediterranean well into the Middle Ages.

The Fatimids maintained trade relations with the Italian city-states like Amalfi and Genoa before the Crusades, according to the Cairo Geniza documents. A document dated 996 mentions Amalfian merchants living in Cairo. Another letter states that the Genoese had traded with Alexandria. The caliph al-Mustansir had allowed Amalfian merchants to reside in Jerusalem about 1060 in place of the Latin hospice.
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