Early Quranic manuscripts
The Topkapi manuscript is an early manuscript of the Quran dated to the early 8th century. This manuscript is kept in the Topkapi Palace Museum, Istanbul, Turkey. It was wrongly attributed to Uthman Ibn Affan (d. 656), but judging from its illumination, the Topkapi manuscript does not date from the period (mid 7th century) when the copies of the Caliph Uthman were written.
Topkapı Palace
The square Tower of the Head Tutor ("Başlala Kulesi"), also known as the Chamber of the Chief Physician and court drugstore ("Hekimbaşı Odası ve ilk eczane"), dates from the 15th century, and is the oldest building in the Fourth Courtyard. It was built as a watch tower, probably during the time of Mehmed II. It has few windows, and its walls are almost two metres thick. The physician had his private chamber at the top, while below was a store for drugs and medicine.