What is the Bosphorus Bridge in Turkey unofficially known as?

The Bosphorus Bridge, known officially as the 15 July Martyrs Bridge and unofficially as the First Bridge, is one of the three suspension bridges spanning the Bosphorus strait in Istanbul, Turkey, thus connecting Europe and Asia (alongside Fatih Sultan Mehmet Bridge and Yavuz Sultan Selim Bridge). It is a gravity anchored suspension bridge with steel towers and inclined hangers.

The decision to build a bridge across the Bosphorus was taken in 1957 by Prime Minister Adnan Menderes. The bridge was completed on 30 October 1973, one day after the 50th anniversary of the founding of the Republic of Turkey, and opened by President Fahri Korutürk and Prime Minister Naim Talu. At the time the bridge was opened, much was made of its being the first bridge between Europe and Asia since the pontoon bridge of Xerxes in 480 BCE. That pontoon bridge, however, spanned the Hellespont (Dardanelles), some distance away from the Bosphorus.