The Italian inventor and creator Leonardo da Vinci realized most of his grandiose projects under the patronage or direct order of influential people. Such as Ludovico Sforza or the Duke of Milan, for whom the famous "Last Supper" was written. The master was looking for unusual and grandiose tasks, and when the Sultan of the Ottoman Empire Bayezid II announced his desire to build a bridge over the Golden Horn Bay, da Vinci offered him an extremely daring project.
Then the bridge was never built - moreover, up to our days doubts remained about the feasibility of the solution proposed by da Vinci. Following the example of the engineers of ancient Rome, he designed a structure that is erected without mortar, held in place only by gravity and friction. At the same time, the bridge was almost 220 m long - ten times more than almost any European bridge of that time. And it had to be built from carefully hewn stones, since a brick or wood would not withstand such a load.
In a letter to Bayezid II, da Vinci assured that in the central part the arch of the bridge would be so high that the mast of a large sailing ship would pass under it. He added an innovation unprecedented at that time - protective wind walls so that the huge structure would not shake under the influence of hurricanes. As it turned out later, the bridge was also earthquake resistant - the model built by an international team of researchers on a scale of 1: 500 calmly withstood the shocks that destroyed the brick buildings of that era.
Researchers admit - despite all the calculations, they did not believe until the last that the bridge would stand. And only when the last stone was laid, and then the forests were removed, it became clear that the medieval genius was right. His design is a gorgeous, revolutionary construction that still amazes with its design today.