Rosenborg Castle is a historic castle located in Copenhagen, Denmark. The castle was built in the early 17th century by King Christian IV and served as his summer residence. Today, it is a popular tourist attraction and houses the Royal Collections of Denmark.

The castle is surrounded by beautiful gardens, which are open to the public, and its interior features exquisite architecture, antique furnishings, and priceless treasures. The castle's most famous attraction is the Danish Crown Jewels, which are kept in the castle's basement vaults.

Visitors to Rosenborg Castle can explore the castle's many rooms and learn about the history of the Danish monarchy. Highlights include the Great Hall, the Knight's Hall, the Royal Bedchamber, and the Crown Room. The castle's gardens are also a popular attraction and feature beautiful landscaping, sculptures, and fountains.

In addition to its historic significance, Rosenborg Castle is also an important cultural center in Copenhagen. The castle hosts a variety of events throughout the year, including concerts, exhibitions, and other cultural events. It is a must-visit destination for anyone interested in Danish history, culture, and architecture.