Learn about Istanbul’s Byzantine history and visit the Grand Bazaar on this guided half-day tour. Save time with pre-purchased tickets. Travel in an air-conditioned vehicle and explore the Sultanahmet neighborhood. Stop inside the Hagia Sophia, and Byzantine-era church that became an Ottoman mosque and is now a museum. Visit the Basilica Cistern and walk around the Hippodrome. Take time to shop at the Grand Bazaar.