The 55-window palace is the principal monument at Bhaktapur Durbar Monument Conservation Zone, one of the five Monument Zones in the Kathmandu Valley, a World Heritage Site. This U-shaped, 3-storey building is believed to be built by King Bhupatindra Malla. The name '55-window palace' is, however of recent origin, given by the western visitors of 17th, 18th and 19th century Nepal.