What if Constantinople had never fallen to the Turks?

[al Roumi]

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I disagree with this, particularly the part about the Ottomans not trading with the Byzantines. Trade in the medieval era is not like modern trade: it was essentially impossible to regulate for most nations. The were too few products, too few trade routes, and too primitive transportation systems to allow shifting from one market to another. The Ottomans would always have traded with the Byzantines because they had no choice, there simply wasn't another market available to them at that time. The only choice available was not trading at all, which was only ever used as a short-term political weapon by a nation that needed the trade less than their trade partners did (e.g. the English wool trade with Flanders throughout the medieval period).

Indeed, the Turkish name for the city (Istanbul) is itself emblematic of the huge significance of the place for trade purposes even when the Byzantines and Ottomans were at each others' throats. Istanbul is derived from a Turkish phrase which roughly translates as "into the city." When people asked each other where they were going, if the destination was Constantinople they would simply say "into the city." That was because Constantinople was so massively important to the region, that you didn't need to even name it. Just calling it "the city" was enough to let everyone know what you meant.

You've mentioned Columbus sailing west as proof that it wasn't important. That actually proves the exact opposite. The entire reason that another route to India was needed was because the fall of Constantinople itself was what closed off the old routes eastward. Without the fall of the city to the Ottomans, Columbus would never have gotten funding for his voyage and the Americas would not have been re-discovered until much later. Indeed, the Genoese thought that Constantinople was so important as a trade hub, that they founded an entire city there (Galata) on the north shore of the Horn. The mega-traders of the era, the Genoese and the Venetians, were pretty much the only people that showed up to aid Constantinople in 1453 during the final siege. They appeared because they knew the city was so utterly important to their own trade that it was worth an open war with the Ottomans to prevent its fall.

It is worth noting that the fall of Constantinople actually marks the beginning of the end of the Italian trading empires. After that point, trade shifted to the overseas trade routes, to the Americas, India, and East Asia. Those routes were monopolized by western European powers who were the only ones capable of sustaining regular trade across huge bodies of open water. Again, this was only done because the much cheaper overland route to the East was closed. If that closure never happened, the venture capital for the initial voyages of exploration would not have emerged until much, much later. Italy would have remained prosperous for far longer, and Spain and Portugal in particular would have had a much more stunted economic growth.

That's an interesting analysis, especially the correlation between the fall of Constantinople and the "beginning of the end" for Genoese/Venetian power. However, I have to question a couple of things:

1 Why the Ottomans would have cut trade off any more so than the Byzantines? As you said, trade was more of a constant reality than a negotiable and infrequent fancy. The Venetians traded extensivley with the Ottomans, it was their continued wealth and influence in the eastern mediterranean that eventualy lead to conflcits between Ottoman and Venetian. Furthermore, trade with the east depended as much on the states in between Asia minor and China/India as those at the extremities of the caravans. If continental overland trade was risky or obstructed, it was surely as likely to have been so due to situations in Persia, Afghanistan etc?

2 Wasn't there enough going on in Italy which had a more immediate effect? i.e. Spanish control of the peninsula -absorbtion of Genoa into the Spanish sphere of influence and economy? The vast majority of Spain's New World ventures were financed by non-Iberian bankers/traders, eg Genoese, other Italian, Flemish, Dutch, German. Especially the Genoese.

Ultimately, Yaseikhaan is right that the strategic worth of Constantinople/Istanbul was compromised by the Western european powers seizing the economic initiative and trading directly in Asia, as well as acquiring New world wealth. So really, it's the Portugese, Dutch and Spanish who sabotaged either occupier of Constantinople/Istanbul's hopes of trade derived wealth.

In fact, for the agrandized Ottoman empire, the strategic focus of trade switched to that passing along the Arabian coast, as the Portuguese held island forts off Yemen and Oman. I think there was even an abortive attempt by the Ottomans to invade India at one stage -to secure control of resources at their source.