Istanbul ,historically known as Constantinople and Byzantium, is the most populous city in Turkey and the country’s economic, cultural, and historic centre. Istanbul is a transcontinental city in Eurasia, straddling the Bosphorus strait between the Sea of Marmara and the Black Sea.
Its commercial and historical centre lies on the European side and about a third of its population lives on the Asian side, both hosting a population of around 15 million residents.Istanbul is one of the world’s most populous cities and ranks as the world’s 7th-largest city proper and the largest European city. Istanbul is viewed as a bridge between the East and West.
Founded under the name of Byzantion on the Sarayburnu promontory around 660 BC, the city grew in size and influence, having become one of the most important cities in history. After its reestablishment as Constantinople in 330 AD, it served as an imperial capital for almost 16 centuries.
It was instrumental in the advancement of Christianity during Roman and Byzantine times, before the Ottomans conquered the city in 1453 CE and transformed it into an Islamic stronghold and the seat of the Ottoman Caliphate.
The city’s biggest attraction is its historic centre, partially listed as a UNESCO World Heritage Site, and its cultural and entertainment hub can be found across the city’s natural harbour, the Golden Horn, in the Beyoğlu district.