Palenque is the most important Mayan and archaeological site. Though much smaller than the huge sites at Tikal or Copán, Palenque contains some of the finest architecture, sculpture and stucco reliefs the Mayans ever produced. The history of the Palenque site begins in 431 with its height under Pakal I (615–683), Chan-Bahlum II (684–702) and Kan-Xul who reigned between 702 and 721. However, the power of Palenque would be lost by the end of the century. Pakal's tomb was not discovered inside the Temple of Inscriptions until 1949. Today, Palenque is a World Heritage Site and one of the best-known sites in Mexico.