Angkor Thom is a large fortified city in Cambodia that served as the capital of the Khmer Empire from the late 12th century to the early 15th century. It was built by King Jayavarman VII, who is considered one of the greatest rulers of Khmer history. Angkor Thom covers an area of about 9 square kilometers and is surrounded by a moat and a wall with five monumental gates. The city contains many temples and monuments, such as the Bayon, the Baphuon, the Terrace of the Elephants, the Terrace of the Leper King, and the Phimeanakas. Angkor Thom is part of the Angkor Archaeological Park, a UNESCO World Heritage Site that attracts millions of visitors every year.