The Historic Areas of İstanbul located on the Historical Peninsula were included in the UNESCO World Heritage List in 1985, and continue to this day to impress visitors with their history and importance. Sultanahmet Square is the heart of the Historical Peninsula and in its vicinity, one can find the most prominent examples of Byzantine and Ottoman architecture. The area’s main sites include: Ayasofya Grand Mosque, Topkapı Palace and Harem, Sultanahmet (Blue) Mosque, the Hippodrome and Basilica Cistern (Yerebatan).