The National Museum of Natural History was officially inaugurated on 22 June 1973. The display areas consisted of a geology and palaeontology halls, an osteology hall, and a hall each for insects, molluscs, fish and birds. Subsequently exotic mammal and mineralogy displays, a cactus garden, and marine aquariums were added, the latter two being closed down some years later. Heritage Malta has embarked on a project to update the present displays. An effort is being made to change the concept from a Victorian-style museum to a present-day showcase of Maltese ecology and biodiversity, shifting emphasis from quantity to quality.