better condition than the laterite ones. The roofs of some temples in Koh Ker had a wood construction and were covered with tiles. In these monuments, holes for the wooden girders are found. The main sanctuary (the temple-complex Prasat Thom/Prang) was not standing in the middle of the ancient city. Water-Tanks Rahal The huge Baray (water-tank) called Rahal is the largest object at the site of the ancient capital Koh Ker. Its length is about and its breath about . The water-tank has three dams covered by steps of laterite. The orientation of the Rahal is not from east to west like the huge water-reservoirs in Angkor; it follows an orientation of North 15° West. Because the most important monuments at Koh Ker have the same orientation it is thought that the Baray was constructed first and the rest of the structures were laid out around it. The Rahal was carved out partly of the stone ground but it is not clear if a natural hollow was the reason for its orientation. These days most parts of the Baray are dried out and covered by grass. Some puddles can be seen in the corner next to the double-sanctuary. Trapeang Andong Preng south of the double-sanctuary Prasat Thom/Prang is a basin dug into the earth with a length of . It has steps of laterite on all sides. During the rainy season the water is standing to a depth of . The Trapeang Andong Preng does not belong to a temple, but it could have been a royal bath, because near this place was once the wooden palace of the king. Trapeang Khnar (carvings) Temples and shrines Complex of the double sanctuary Prasat Thom/Prang Linear plan The complex of the main monument in Koh Ker has a linear plan and is about long. Its orientation is E15°N, that is parallel to the Baray. The parking area cuts the complex in two parts. On the east side of the parking are two structures, called palaces. On the west side are the other monuments. They are standing behind the restaurants and are from east to west: an immense entrance pavilion, two towers, a red brick entrance-tower (Prasat Krahom), a surrounding wall with two courts (in the eastern court is the temple-complex Prasat Thom with a moat, in the western court stands the seven tiered pyramid, named Prang). Behind the enclosure is an artificial