Istanbul’s magnificent Topkapi Palace dates back to the 15th century. It served as the royal dwelling of the Ottoman sultans for almost 400 years. Nearly 4,000 people once lived within the palace’s confines. The splendid residence housed a mint, a hospital, libraries, schools, and more. Some of the most important Muslim religious relics are kept here. After the fall of the Ottoman Empire, Topkapi palace became a museum. Ornately constructed courtyards and gardens complete the landscape. This UNESCO World Heritage Site is a highlight of Turkish history.