"Today transfer to the airport for your flight to Istanbul. Upon arrival transfer to the old town. You will start touring with St. Sophia (Closed on monday) , the cathedral built by Emperor Justinian in 537 which was the largest church in Christendom for a thousand years, the Byzantine Hippodrome with its various monuments including a 3500-year-old red granite obelisk brought from Egypt and erected here in 390 AD. The Ottoman Empire produced marvelous architecture and you'll see two of its finest works: Topkapi Palace(closed on tuesday) , home of the sultans, and the famed Blue Mosque of Sultan Ahmet I. After all these visits, you'll venture into the labyrinthine Grand Bazaar.Transfer back to your hotel for overnight. Note: Morning Flight is Required! "