The museum has over 18,000 holdings related to the history, archaeology and natural history of Alderney. The museum displays exhibit items of social history, military history, the evacuation of the island in 1940 and the subsequent occupation by German troops. Some of the most notable items include plans and drawings of the construction of the "Alderney Breakwater", built between 1847 and 1864. The 1852 George S. Reynolds' lithograph is part of the Alderney Breakwater group of documents. Holdings are as diverse as 1940 census papers, cinerary urns, dulcie cups, and curry powder bottles. There are also church and government documents, as well as land and cemetery registers. Materials that document Alderney customs, folk life, genealogy, geology, and the island's natural history are part of the holdings.