Make your way to the meeting point in either Taksim, in front of The Marmara Hotel, or Sultanahmet, in front of Tamara Restaurant, to embark on a captivating journey through the Byzantine history of Istanbul.The tour begins at the Golden Horn, a natural harbor of the Byzantines, named for its horn-like shape and the shimmering golden reflections it casts under the sun. Visit the Patriarchate of Fener, the seat of Orthodox Christianity since Constantine the Great's declaration of Christianity as the Roman Empire's religion.Next, admire the Church of Panagia of Blachernae, renowned for its sacred spring, “Hagiasma,” and its ritual bath, “Hagion Lousma.” Continue to the Anemas Dungeons (from outside), part of the Blachernae Palace, and discover its unique historical structure, featuring 14 separate dungeons and towering cells that once held high-ranking prisoners.The journey continues with a visit to Tekfur Palace (from outside), the last surviving pavilion of the Blachernae Palace, constructed in the 12th century and standing adjacent to the city walls. Marvel at the Byzantine City Walls, a 22-kilometer-long fortification with 96 towers and 9 main gates, dating back to the 5th century.Finally, see the St. Savior in Chora (Kariye Museum) from outside. This former Byzantine monastery is celebrated for its stunning mosaics and frescoes depicting biblical scenes and the life of Jesus. Due to ongoing renovations, interior visits are currently unavailable.The tour concludes with a drive back to your starting point, leaving you immersed in Istanbul's rich Byzantine heritage.