Gripsholm Castle is a historic royal castle located in Mariefred, Sweden. Built in the 16th century, it served as a residence for Swedish monarchs and has been well-preserved over the years. The castle features a mix of architectural styles, including Renaissance and Baroque elements, and is surrounded by beautiful gardens and a picturesque lake. Today, Gripsholm Castle houses a museum that showcases a collection of portraits from the Swedish National Portrait Gallery. Visitors can explore its grand halls, learn about its history, and enjoy the scenic views of Lake Mälaren. The castle is a popular tourist destination, attracting history enthusiasts and nature lovers alike.