Just 15km (9 miles) west of central Stockholm, Drottningholms Slott is one of the most magnificent legacies of Sweden's imperial age, justly compared to Louis XIV's Versailles. Now a UNESCO World Heritage site, the palace was begun by the great Swedish baroque architects, Nicodemus Tessin the Elder and Younger in 1662, for the dowager queen, Hedvig Eleonora. It is surrounded by equally splendid gardens containing the delightful Rococo Chinese Pavilion, almost a palace in itself. It also has the world's best-preserved palace theatre, with its 18th-century stage machinery still in working order - a popular venue for summer concerts and performances. Closed to the public in winter, the palace is the official residence of King Carl Gustaf XVI and the Swedish royal family. Guided tours in English are available on request.