6Topkapi Palace, Turkey
Topkapi Palace in Istanbul served as the primary residence and administrative headquarters of the Ottoman sultans for nearly 400 years. Built in the 15th century by Mehmed the Conqueror, the palace is a stunning blend of Islamic, Ottoman, and Byzantine architecture. It features a series of courtyards, pavilions, and gardens, with the Harem and the Treasury being particularly notable. The Treasury houses a remarkable collection of jewels, including the famous Topkapi Dagger and the Spoonmaker’s Diamond.
