This sub-class includes operation of museums of all kinds: •art museums, applied art crafts and/or design museums e.g., of jewellery, furniture, costumes, ceramics, silverware •natural history, science and/or technological museums, historical museums, including military museums •other specialised museums •open-air museums, eco-museums as well as digital and/or virtual museums •art galleries not for retail sale •collections in historic houses and/or national galleries, interpretation centres for ethnographic, religious and/or folk art