People visit the Royal Domain of Drottningholm at the suburb of Stockholm, Sweden, May 25, 2017. The Royal Domain of Drottningholm, one of Sweden's Royal Palaces, stands at the suburb of Stockholm. With its castle, perfectly preserved theatre, Chinese pavilion and gardens, it is the finest example of an 18th century north European royal residence inspired by the Palace of Versailles. The Royal Domain of Drottningholm was listed as a world heritage site by UNESCO in 1991. (Xinhua/Gong Bing)
