Istanbul (ancient Byzantium) was founded on Seven Hills like Rome.
Istanbul is the only city in the world which is both in Europe and Asia geographically.
Istanbul is one of the biggest cities in the world, with over 13 million population.
Istanbul was the most crowded city of the world in 1502, then London took this title in 1840.
Istanbul was the capital city of the Byzantine Empire and then the Ottoman Empire during their rule.
Tulips, the symbol of Holland, originated in Istanbul and were sent from Istanbul to Netherlands.
Blue Mosque is the only mosque in Istanbul with six minarets, which is the maximum number you can have in a mosque.
There are two suspension bridges on the Bosphorus Strait connecting Europe to Asia. And a third one is planned.
Istanbul has the third oldest subway in the world, built in 1875. It´s 573 meters long and located in Tunel neighborhood at Beyoglu district. London subway was built in 1863 and New York subway in 1868.
Grand Bazaar is the biggest old covered bazaar in the world, with over 3.000 shops.
Hagia Sophia was the largest church in the world for about 900 years.
Istanbul was the European Cultural Capital City in 2010.
Biggest light house of Turkey is in Sile district on the Black Sea coast. It´s 19 meters (62 feet) high and 1,1 meters (3,6 feet) wide.
Four bronze horses which are decorating today San Marco Cathedral in Venice, were taken from Istanbul (Constantinople back then) by the Crusaders in the 13th century.
British author Agatha Christie wrote her famous novel “Murder on the Orient Express” at Pera Palas Hotel in Istanbul.