Roman decline , found in the excavation of a monastery in
Ajanta Caves,
India. Trade declined from the mid-3rd century during
a crisis in the Roman Empire, but recovered in the 4th century until the early 7th century, when
Khosrow II, Shah of the
Sasanian Empire,
occupied the Roman parts of the Fertile Crescent and Egypt until
being defeated by the
Eastern Roman Emperor Heraclius at the end of 627, after which the lost territories were returned to the Eastern Romans.
Cosmas Indicopleustes ('Cosmas who sailed to India') was a Greek-Egyptian trader, and later monk, who wrote about his trade trips to India and Sri Lanka in the 6th century.
Ravaging of the Gupta Empire by the Huns (c.319-560 CE) The
Gupta Empire had greatly benefited from Indo-Roman trade through the export of numerous luxury products such as
silk, leather goods, fur, iron products,
ivory,
pearl or pepper from the ports of
Bharutkutccha,
Kalyan,
Sind and the city of
Ujjaini. The
Alchon Huns' invasions (496–534 CE) are said to have seriously damaged the Guptas' (c. 319–560 CE) trade with
Europe and
Central Asia. Soon after the invasions, the Gupta Empire, already weakened by these invasions and the rise of local rulers, ended as well. Following the invasions, northern India was left in disarray, with numerous smaller Indian powers emerging after the crumbling of the Guptas.
Arab expansion and
Ummayad Caliphates, drawn on the modern state borders. The Arabs, led by
'Amr ibn al-'As, crossed into Egypt in late 639 or early 640 CE. This advance marked the beginning of the
Islamic conquest of Egypt. brought an end to 670 years of Roman trade with the subcontinent. However, knowledge of the Indian subcontinent and its trade was preserved in Byzantine books and it is likely that the court of the Emperor still maintained some form of diplomatic relation to the region up until at least the time of
Constantine VII, seeking an ally against the rising influence of the Islamic states in the Middle East and Persia, appearing in a work on ceremonies called
De Ceremoniis. The
Ottoman Turks conquered Constantinople in the 15th century (1453), marking the beginning of Turkish control over the most direct trade routes between Europe and Asia. The Ottomans initially cut off eastern trade with Europe, leading in turn to the attempt by Europeans to find a sea route around Africa, spurring the European
Age of Discovery, and the eventual rise of European
mercantilism and
colonialism. ==See also==