It is located in Drottningholm. Built on the island Lovön (in Ekerö Municipality of Stockholm County), it is one of Sweden's Royal Palaces. It was originally built in the late 16th century. It served as a regular summer residence of the Swedish royal court for most of the 18th century. Apart from being the private residence of the Swedish royal family, the palace is a popular tourist attraction.
The palace and its grounds have seen many renovations, changes and additions over the past 400 years. The largest renovation, in which electricity, heating, sewage, water lines were either installed or updated and the castle roof replaced, took place between 1907 and 1913.
During a 20-year-period beginning around 1977, several major areas of the palace were restored and rebuilt. The library and national hall received much of the attention and fire protection was installed throughout the palace. In 1997, work began to clean and rebuild the exterior walls. This was completed in 2002.
The palace is a UNESCO World Heritage Site, mainly because of the Drottningholm Palace Theatre and the Chinese Pavilion. It was added to the list in 1991.