Haga Castle is a historic royal residence located in Sweden, specifically in the city of Stockholm. Built in the 18th century, it was designed by architect Carl Fredrik Adelcrantz and served as a summer palace for the Swedish royal family. The castle is known for its beautiful gardens and picturesque surroundings, making it a popular destination for visitors. The architecture of Haga Castle reflects the neoclassical style, featuring elegant facades and intricate details. The castle is part of the larger Haga Park, which includes several other notable structures and natural landscapes. Today, Haga Castle is primarily used for official functions and ceremonies.