Topkapi Palace is one of the must-see attractions in Istanbul that combines history and stunning scenery in an experience that is not to be rushed. Rich in the history of the Ottoman Empire, the Topkapi Palace is surrounded by five kilometers (3.1 miles) of stone wall with 27 towers. Topkapi, which dates back to the 15th century, is situated on a hill overlooking the Sea of Marmara, the Bosphorus and the Golden Horn. At one time it was an official royal residence of the Ottoman Empire sultans and seat of Turkish government, but is now a museum that is considered the largest and oldest palace in the world. Visitors can get a glimpse of the harem’s quarters, where the government worked, a collection of old weapons used by the sultans, the palace kitchens with a huge porcelain collection, and the treasury with its collection of jewels and clocks.