Kumsusan Palace of the Sun, formerly the Kumsusan Memorial Palace, and sometimes referred to as the Kim Il-sung Mausoleum, is a building near the northeast corner of the city of Pyongyang that serves as the mausoleum for Kim Il-sung, the founder of North Korea, and for his son Kim Jong-il, both posthumously designated as eternal leaders of North Korea.The palace was built in 1976 as the Kumsusan Assembly Hall and served as Kim Il-sung's official residence. Following the elder Kim's death in 1994, Kim Jong-il had the building renovated and transformed into his father's mausoleum. It is believed that the conversion cost at least $100 million. Some sources put the figure as high as $900 million. Inside the palace, Kim Il-sung's embalmed body lies inside a clear glass sarcophagus. His head rests on a Korean-style pillow and he is covered by the flag of the Workers' Party of Korea. Kim Jong-il is now on display in a room close to and very similar to his father's.Kumsusan is the largest mausoleum dedicated to a Communist leader and the only one to house the remains of multiple people. It is fronted by a large square, approximately 500m in length. It is bordered on its northern and eastern sides by a moat.Access and rulesForeign visitors can access the palace only on Thursdays and Sundays. They must be on an official government tour. Photography, videotaping, smoking and talking are not permitted anywhere inside the palace. The palace plaza, though, is open all week, and is the venue for national rallies.