Rosenborg Castle and The Royal Treasury

Rosenborg Castle stands at Øster Voldgade 4A in Copenhagen, Denmark, on the edge of the King's Garden (Kongens Have), the city's oldest royal park. King Christian IV built it as a summer residence between 1606 and 1634 in the Dutch Renaissance style, with red brick, sandstone trim, towers and a copper-green roof. It remained a royal residence until the early 18th century and has since served as a museum of the Danish monarchy. Inside, around two dozen rooms are arranged by reign and retain their original furnishings, tapestries, portraits and decorative objects, giving a sense of how successive kings lived. The most visited sections are the Knights' Hall on the upper floor, with its silver lions and coronation throne chairs, and the Royal Treasury in the basement. The Treasury holds the Danish Crown Jewels, including the crowns of the absolute monarchs, the regalia used at coronations, jewellery and ceremonial swords, displayed in secured glass cases. Visits typically take one and a half to two hours, depending on how long visitors linger in the Treasury. Rooms are fairly small, so queues can form at popular displays, and the busiest period is around midday in summer when tour groups arrive. Arriving at opening time allows visitors to see the Crown Jewels before the groups, and late afternoon is also calmer. After the interior, the King's Garden is a pleasant place to walk, with lawns, rose beds, statues and a children's playground, and it is popular with locals for picnics. The castle can be photographed from the garden side in good light, and the moat and park paths offer views of the facade. Opening hours vary by season, with longer days in summer and some closed days in winter, so checking the official site is advised.