The Fatih Sultan Mehmet Bridge, also known as the Second Bosphorus Bridge (in Turkish: Fatih Sultan Mehmet Köprüsü, F.S.M. Köprüsü or 2. Köprü), is a bridge in Istanbul, Turkey spanning the Bosphorus strait. When completed in 1988, it had the 6th longest suspension bridge span in the world; today it has the 18th.
The bridge is named after the 15th century Ottoman Sultan Mehmed the Conqueror, who conquered Constantinople (Istanbul) in 1453 from the Byzantine Empire. It carries the European route E80, Asian Highway 1, and Otoyol 2 highways.