National Museum is the first museum that lies on the bottom level of Swayambhu, a holy hill of Kathmandu Valley. It occupies about 50 Ropani of land with different types of buildings, gardens, and opens space in its compound. Now it provides the service to collect and display rare and precious art heritages. The history of this museum shows that at the beginning it was an Arsenal house, built by Prime Minister General Bhimsen Thapa in 1824. After it, in 1926 Rana Prime Minister Chandra Shumsher added two wings in the north and south of the main building and it was given the name of Silkhana Museum. Later in 1938 Rana Prime Minister Juddha Shumsher changed its name to Nepal Museum and its doors were opened to the public on 12th February 1939 (Amatya,1999:45).