Topkapi Palace is one of the most famous palaces of the Ottoman Empire in Istanbul, which was the administrative center of the empire from 1465 to 1853. Sultan Mohammad the Conqueror ordered the construction of this palace in 1459 and its construction was completed in 1465. This palace is located between the Golden Horn and the Sea of Marmara in Istanbul and has a great view of the Bosphorus.
Here is a video about the historic sites and what can be find inside: