Istanbul is the city of wonders and magic places where history, art and culture amaze continuously visitors. Great masterpieces like the 6th-century Hagia Sophia, the 16th-century Blue Mosque and the Hippodrome of Constantine make the ancient capital unique in the world. Historic Areas of Istanbul was declared World Heritage by UNESCO because the city has been associated with major political, religious and artistic events for more than 2,000 years. Istanbul historically Byzantium and later Constantinople is simply the cultural and financial center of Turkey, with its 10 million of inhabitants is the most populous city of the country.