DVD. Global Treasures. 10 Minutes. Kungliga Slottet is a majestic royal castle that is located on the highest point of the island of Stadsholmen in the middle of the attractive historical old town of Stockholm known as Gamla Stan. The castle became an official royal residence when Swedish monarch, King Adolf Fredrik, resided there. With its 608 rooms the castle is considered to be one of the greatest royal residences in the world and home to the Swedish crown jewels. The design of the Royal castle and its splendid facade was created by the architect, Nicodemus Tessin The Younger. His father, Nicodemus The Elder, built the Tre Kronor Castle at the end of the 17th century which was named after the three crowns that are depicted in the Swedish coat of arms. In 1697 a devastating fire swept through Stockholm and also the Tre Kronor Castle. Shortly after the fire, the castle of Kungliga Slottet, designed in Italian Baroque style, rose up from the ruins of Tre Kronor Castle. For more than 250 years the cityscape of Sweden's capital of Stockholm would not have been complete without the splendour of Kungliga Slottet.