Blue Mosque (Sultanahmet Mosque)
This mosque's name comes from the 20,000 shimmering blue-green Iznik tiles that cover its interior. Built in the 17th century, the Blue Mosque is still in active use, but tourists may enter through a separate entrance.
This opulent palace was the former residence of Ottoman sultans in the 19th and early 20th centuries. Boasting both European and Turkish styles, the palace abounds in decorative finery such as crystal chandeliers, trompe l'oeil ceilings and intricate carpets.