Topkapı Museum
Topkapı Palace served as the main residence and administrative headquarters of the Ottoman sultans in the 15th century. It is now a museum containing Ottoman clothing, weapons, armor, miniatures, religious relics, and illuminated manuscripts like the Topkapi manuscript. Highlights of the collection include the Spoonmaker’s Diamond and Topkapi Dagger (Wikipedia).
Image copyright © Matthias Suessen, Wikimedia Commons