Introduction to the 7 hills in the old city: The first hill includes Hagia Sophia Church, St. Irene Church, Sultan Ahmed Mosque, Ahmed III Fountain, Colored Brick Pavilion, Topkapi Museum, Mal Mara seaside city walls. The second mountain has the Nuru Osmaniye Mosque, the Burning Column, and the indoor market. The third mountain contains the Laleli Mosque and the Valens Aqueduct. The fourth mountain contains the Fatih Mosque and the Eski Immalet Mosque. The fifth mountain contains Gul Mosque and St. Mary of Mongolia Church. The sixth hill contains the Kariya Mosque, the Adrianople Gate, and the Constantinople Palace. The Seventh Hill has the Seven Towers Fort and the Mosque of Imrahhor (i.e. St. John's Church in Staudion).