Take part in a guided morning tour and see the most famous sites in Istanbul. To begin, head to Hagia Sophia, an ancient basilica that was built by Constantine the Great in the 4th century and reconstructed by Justinian in the 6th century. Take some time to admire the beautiful architecture of this historic site. Continue on to the Sultanahmet Imperial Mosque, a building that was constructed in the 16th century and is known as the Blue Mosque because of its fascinating interior decor of blue Iznik tiles. Next, visit the Hippodrome, a monument that was originally a circus sporting center of Constantinople, the capital of the Byzantine Empire. Last but not least, go to the Grand Bazaar, one of the oldest and biggest markets in the world, which has more than 4,000 shops that attract approximately 300,000 visitors daily. Stop to purchase a few memorable souvenirs to remember your day out in Istanbul.