Terrace of the Leper King, Ancient ceremonial terrace in Angkor Thom, Cambodia

The Terrace of the Leper King is a U-shaped sandstone platform about 25 metres on each side and 6 metres high, built in the Bayon style. Its outer walls are carved in tiers of seated figures, and in 1911 a second carved wall was found behind the outer face, where the original wall had been extended and buried. Since 1994 the EFEO has restored it, and the double wall is visible on the southeast side.

Built in the late 12th century under Jayavarman VII in the Bayon style, the terrace stands in the northwest corner of Angkor Thom's Royal Square. A 14th–15th-century inscription identifies it with Dharmaraja, an epithet of Yama, the god of death. In 1911 a second carved wall face was found behind the outer one, and since 1994 the EFEO has restored the monument, exposing the doubled walls on the southeast side.

The Khmer name is Preah Lean Sdach Kumlung, but the statue found here was inscribed Dharmaraja, an epithet of Yama, the god of death. Discolouration and moss on the figure suggested leprosy, linking it to a legend that King Yasovarman I had the disease. The original metre-high statue is now in the National Museum in Phnom Penh.

The terrace stands in the northwest corner of Angkor Thom's Royal Square, immediately north of the Terrace of the Elephants. An Angkor pass is required. Since the platform is viewed from ground level, sturdy shoes help on the dry grass and uneven stone; early morning or late afternoon light is easier for reading the carvings.

Hidden passages between the double walls contain numerous well-preserved carvings of supernatural beings such as Garuda birds and Naga serpents. These concealed areas reveal craftsmanship and spiritual elements that remain invisible from the outside.