Sultanahmet, one of the most precious areas on earth. İf you are into history, you should see the wonderful temples. İf you are a religious person, you must breathe the peaceful air in Sultanahmet. The important buildings and museums in the area: Topkapı Palace, Hagia Sophia, Blue Mosque, Yerebatan.
Hagia Sophia is built by Emperor Justinianus, it is the jewelry of İstanbul. A huge church, with lots of mosaics. Sultan Fatih came to İstanbul and turned Hagia Sophia in to a mosque. İn modern Turkey, today, its not used as a church or as a mosque, it is place where millions of people come and see, a gorgeous museum. The athmosphere is breath taking. You will fall in love with this master piece of art. And every mosaic is protected.
Opposite of Hagia Sophia, Suleiman The Magnificent builted a gorgeus mosque, The Blue Mosque. The architecht was Mimar Sinan. He is one of the greatest artists of the era. You may heard the name of Suleiman, from the tv series, Muhtesem Yuzyıl. (The Magnificent Century)
Topkapı Palace is a place where fairy tales begin. A wonderful and giant door waits you, like the palaces of kings in fairy tales. You can imagine the Otoman soldiers. When you enter the door, you will see lots of buildings, The Harem, Divan (the place of government) the place where relics are protected, the building of cooks and places where you can feel the athmosphere and have a rest.
Also, dont forget to see Yerebatan. İt is a mystical place from Byzintines. Cheer and let the beatiful city make you smile.