National Museum, located in Stockholm, Sweden. It was a house belonging to the Count and Countess von Hallwyl, but was donated to the Swedish state in 1921, eventually becoming a museum. It was officially opened in 1939. When you visit this museum you will learn about the family's history, and the wonderful house, where the Countess's dedicated collection resulted in one of Sweden's largest collections of antique furniture, art and porcelain. Experience modern luxury and comfort in a luxury home, with dining room, salons, smoking room, weapons room, billiards room and porcelain room.