Decline & Legacy
The Ottoman Blockade and the Silk Road
The Ottoman blockade of the eastern Mediterranean in the fifteenth and sixteenth centuries is one of the central turning points in the long history of the…
The Ottoman blockade of the eastern Mediterranean in the fifteenth and sixteenth centuries is one of the central turning points in the long history of the overland Silk Road. By capturing Constantinople in 1453, conquering the Mamluk Sultanate in 1517, and extending their authority to the Hejaz, the Levant, Mesopotamia, and the Red Sea, the Ottomans placed almost every traditional western terminus of the caravan trade under a single, Islamic, Turkish-speaking power. The effect on the European spice and silk trade was immediate: customs duties and transit fees multiplied, and the Italian maritime republics that had profited from the old system found their position progressively undermined. The blockade is treated here as a long process rather than a single event, and forms a central chapter in the broader account of the decline of the Silk Road.
The fall of Constantinople
The decisive moment was the Ottoman conquest of Constantinople on 29 May 1453, when the forces of Sultan Mehmed II breached the Theodosian walls and brought the Byzantine Empire to an end. For the previous millennium, Constantinople had been the principal European terminus of the overland trade. With the fall of the city, the entire mechanism of transit through the Bosphorus passed into Ottoman hands. What that actually meant, in commercial terms, took several decades to work through; the caravans did not stop on 30 May 1453.
The Greek and Genoese merchant communities were recognised in the surrender terms (the ahdname granted by Mehmed to the new Greek residents of the city), but their position became increasingly precarious. Overland caravans from Tabriz and Bursa continued to arrive, but the terms of trade were no longer set by Christian intermediaries. Greek scholars and merchants fled to Italy, taking manuscripts and expertise that helped to shape the Italian Renaissance. The fall of Constantinople was, for the Ottomans, a declaration that they were the new imperial centre of the eastern Mediterranean. I think the conventional narrative is right that the fall mattered, but it matters more as a date than as a cause — the underlying shift in the terms of trade was already visible in the 1440s and was simply confirmed, not created, in 1453.
The Ottoman blockade is, in modern terms, a tariff regime rather than a wall.
Ottoman control of the Middle East
The conquest of Constantinople was the first of a series of Ottoman expansions that progressively closed the old system. Between 1453 and the early sixteenth century, the Ottomans absorbed Serbia, Bosnia, Albania, and the Crimean khanate, eliminating the Balkan routes to Central Europe. The conquest of the Mamluk Sultanate in 1516–1517 brought Syria, Egypt, the Hejaz, and the Red Sea ports of Alexandria, Damascus, and Jeddah under Ottoman rule, and with them the chief entry points for Indian Ocean spices into the Mediterranean. Goods from India, Southeast Asia, and China still arrived in large quantities at Hormuz and Basra, and travelled by caravan to Aleppo, Beirut, and Smyrna, but the customs duties, transit fees, and trade regulations now reflected Ottoman priorities. The European share of the profits on Asian goods fell sharply, and the political meaning of the Silk Road trade shifted accordingly. A point that is often missed: the Ottoman share of the spice trade did not, in fact, fall after 1517 — it was the European share that fell, because the Portuguese sea route to Calicut and then the Dutch and English East India Companies diverted the higher-value portion of the trade around the Ottoman lands entirely.
The conventional narrative treats the Ottoman blockade as a single Ottoman policy decision. I think that is wrong. The Ottomans imposed high tariffs, levied transit fees, and signed commercial capitulations with the European powers (the 1536 capitulation to Francis I being the most consequential), but they did not close the routes. The European search for sea routes was driven by the prices the Ottomans charged, not by an Ottoman policy of exclusion. The blockade was a price effect, not a barrier effect. A reader who looks for a single Ottoman decree closing the overland trade will not find one, because no such decree exists.
A personal note
The “Ottoman blockade” of the eastern Mediterranean is a useful shorthand, but it does not describe a single Ottoman policy. The Ottomans imposed high tariffs; they did not close the routes. The European search for sea routes was driven by the high prices the Ottomans charged, not by an Ottoman policy of exclusion. The blockade was a price effect, not a barrier effect.
Further reading
- Hansen, The Silk Road (2012)
- Frankopan, The Silk Roads (2015)
- Liu, The Silk Road in World History (2010)
- Allsen, Culture and Conquest in Mongol Eurasia (2001)
- Whitfield, Life Along the Silk Road, 2nd ed. (2015)
- The relevant Cambridge History chapter