The National Museum is divided into four divisions as follows: Irish antiquities, folklife, natural history and art and industry.
The Irish antiquities division of the Museum is the repository for archaeological objects. Highlights in this collection collected in the past three years include a Viking decorated lead-weight, a Viking silver bracelet, a bronze cannon from a Spanish Armada ship, Trinidad Valencera, and a Late Bronze Age bracelet in gold from Mooghaun, County Clare. The number of objects acquired since 1995 are as follows: 1995: 2,013 (as a result of the provisions contained in the National Monuments Act, 1994); 1996: 221; 1997:70.
The folklife divisions collection describes the people of Ireland's domestic and intimate history from c. 1800 to c. 1950. While there are no particular highlights, each one being unique, the collection includes artisan tools, furniture, settle beds, and clothing used by ordinary people. The division acquired approximately 300 items in each of the years 1995 to 1997 inclusive. Also in 1997 the division acquired the contents of a museum in Shrule, County Mayo, which closed down during that year.
The natural history division holds the geological, zoological, and entomological archives of the people of Ireland. Examples include 269 slides of aphids from England, Irish centipedes and millipedes, cave bear bones excavated at Armagh and a collection of birds eggs from St. Declan's School, Waterford. The number of objects acquired since 1995 are as follows: 1995: 68 lots; 1996: 55 lots; 1997: 62 lots. Lot describes a collection which can mean one single specimen or up to 10,000 specimens (as in the case of the Washington insect collection which contains c.10,000 specimens).