Byzantine Landmarks of Istanbul
Start the tour at the Basilica Cistern, a 6th-century underground water reservoir, along with your Istanbul tour guide.
Head to Chora Museum, which was a church built during the Byzantine period and converted into a mosque after the Turkish invasion. It is now a museum known for its unique mosaics and frescoes.
Walk to the city walls reinforced by Theodosius II.
Continue to the Palace of Porphyrogenitus, the best-preserved of the three Byzantine palaces that have survived in the city.