| 1 | The city is located on the hills at the head of Zolotoy Rog Bay. | |
| 2 | In the distance one can see the poles of the future bridge across Zolotoy Rog Bay. | |
| 3 | Istanbul lies between the Black Sea and Sea of Marmara, forming Strait of Bosporus and Golden Horn Bay. | |
| 4 | One of the city's most striking landmarks, it is a huge, cone-capped cylinder that dominates the skyline on the Galata side of the Golden Horn. | |
| 5 | Leonardo then returned to Florence where he learned that Sultan Bayezid II of Turkey sought to build a bridge across the Bosporus' Golden Horn. |