The Bosphorus Bridge, known officially as the 15 July Martyrs Bridge and colloquially as the First Bridge, is the oldest and southernmost of the three suspension bridges spanning the Bosphorus strait in Istanbul, Turkey, thus connecting Europe and Asia. The bridge extends between Ortaköy and Beylerbeyi.

The Yavuz Sultan Selim Bridge, also known as the Third Bosphorus Bridge, is a vehicular bridge over the Bosphorus strait, to the north of Istanbuls's two older suspension bridges, the 15 July Martyrs Bridge being the First Bosphorus Bridge and Fatih Sultan Mehmet Bridge the Second Bosphorus Bridge. The bridge is located near the entrance to the Black Sea from the Bosphorus strait, between Garipçe in Sarıyer on the European side and Poyrazköy in Beykoz on the Asian side.