Tour the "Sultan Ahmet Center", the heart of the old city from where the Byzantine and Ottoman Empires were ruled. Hagia Sophia, the Church of the Divine Wisdom, one of the greatest marvels of architecture, constructed as a basilica in the 6th century by Emperor Justinian. Blue Mosque, facing Hagia Sophia, famous with its blue İznik tiles and unique with 6 minarets, built in the name of Sultan Ahmet.(visit is not possible on Friday because of crowded noon prayer) Hippodrome, center of sportive events (chariot races, athletics) and political activities of the old city. Serpentine Column, Obelisk of Theodosius and German Fountain of Wilhelm II are the monuments decorating the Hippodrome. Grand Covered Bazaar, most attractive shopping center and the biggest "souk" in the world with nearly 4000 shops selling antiques, jewellery, gold, carpets, leatherware and souvenir. (Art demonstration of handmade Turkish carpets upon request)