The Barbaros Boulevard () is a -long major street in the Beà Âiktaà  district on the European side of Istanbul, Turkey. It runs in a straight line in southâÂÂnorth direction from Beà Âiktaà  Square over Yñldñz up to Zincirlikuyu, where it passes over to Büyükdere Avenue. It is named after the Ottoman admiral of the fleet Hayreddin Barbarossa () (c. 1478âÂÂ1546), whose tomb is located in Beà Âiktaà Â.
It is a major artery of the Istanbul Central Business District, which is not located in the historic center of the city, but rather north of Taksim Square.
The long boulevard ascends a slope from elevation at Beà Âiktaà  Square up to at Balmumcu before Zincirlikuyu. This part of the street is wide with a slope gradient of 8%, while the part between Balmumcu and Zincirlikuyu has a width of and a slope gradient of 2âÂÂ3%.
The construction of the boulevard began in 1957, within the urban redevelopment project for Istanbul by Italian city planner, Luigi Piccinato initiated by Prime Minister Adnan Menderes (1899âÂÂ1961). Opened to traffic in 1958, the street was initially called Yñldñz Yokuà Âu (Yñldñz Slope) or Yñldñz Yolu (Yñldñz Road); since it passes through the Yñldñz neighborhood.
Its importance grew as it was connected to the 1973-built Bosphorus Bridge, which became the first direct route between the two sides on the Istanbul Strait. It serves as a feeder for the Bosphorus Bridge, which carries the inner-city motorway .