Sultanahmet Square and its surroundings are among the most important points of Istanbul in terms of attracting local and foreign tourists. The historical Sultanahmet Square and its surroundings contain many must-sees. Notable historic buildings in Istanbul such as Hagia Sophia Mosque, Turkish-Islamic Arts Museum, Haseki Bath, and Blue Mosque are located in this square. Theodosius Obelisk, Topkapi Palace, Basilica Cistern, and Hagia Irene Museum whose 2021 entrance fee is US$8.26 for foreigners are also very close to the square.