Istanbul: Suleymaniye Mosque, Spice Bazaar, Blue Mosque, Hippodrome and Topkapi Palace. Suleymaniye Mosque: Istanbul's most important mosque is both a tribute to its architect, the great Sinan, and a fitting memorial to its founder, Suleyman the Magnificent. Spice Bazaar: Also known as the the Egyptian Bazaar. The L-shaped market, together with the mosque, were built in 1663 for the mother of Mehmet IV. Blue Mosque: This is the most tourist visited mosque in the world. This mosque is built next to Saint Sophia, built by Christians, so the Muslims wanted a larger mosque. . Hippodrome: There is very little left of the hippodrome which had a capacity of 75,000 to 100,000 people. In places you can still see the retaining walls that used to support the stands around the hippodrome. . Topkapi Palace: Topkapi Palace was built between 1459 and 1465 as the principal residence of Mehmet II, after his conquest of Constantinople. This is the second largest palace in the world.