Karaköy, the modern name for the ancient Galata, is a commercial neighborhood in the Beyoğlu district of Istanbul, Turkey, located at the northern part of the Golden Horn mouth on the European side of Bosphorus.Karaköy is one of the oldest and most historic districts of the city, and is today an important commercial center and transport hub. The location is connected with the surrounding neighborhoods through streets originating from Karaköy Square. The Galata Bridge links Karaköy to Eminönü in the southwest, Tersane Street to Azapkapı in the west, Voyvoda Street to Şişhane in the northwest, the steeply sloping Yüksek Kaldırım Street to Beyoğlu in the north, Kemeraltı Street and Necatibey Street to Tophane in the northeast.The commercial quarter, which was originally the meeting place for banks and insurance companies in the 19th century, is today also home to mechanical, electrical, plumbing and electronic parts suppliers.
Istanbul (historically Byzantium and later Constantinople; see the other names of Istanbul) is the largest city of Turkey and the third largest city in the world. The city covers 27 districts of the Istanbul province.It is located on the Bosphorus Strait and encompasses the natural harbor known as the Golden Horn, in the northwest of the country. It extends both on the European (Thrace) and on the Asian (Anatolia) side of the Bosphorus, and is thereby the only metropolis in the world which is situated on two continents. In its long history, Istanbul served as the capital city of the Roman Empire (330–395), the East Roman (Byzantine) Empire (395–1204 and 1261–1453), the Latin Empire (1204–1261), and the Ottoman Empire (1453–1922). The city was chosen as joint European Capital of Culture for 2010. The historic areas of Istanbul were added to the UNESCO World Heritage List in 1985.