Lopburi is best known for its historical sites from the time it was under the influence of the Khmer empire. Lopburi’s most famous landmark is the Phra Prang Sam Yot, a typical Khmer architecture shrine with three huge prangs built during the 13th century. Other Khmer remains are the Prang Khaek prangs, the San Phra Kan shrine and the Wat Phra Sri Rattana Mahathat temple.
When King Narai ruled the Ayutthaya Kingdom at the height of its power, Lopburi became an important city in the Kingdom. In 1655 the King built his Palace in Lopburi where he stayed much of the year. The Kraison Hall and the Wichayen House were also built by King Narai and still remain today in various states of repair.