Sir Aurel Stein (1862-1943) is renowned for his archaeological expeditions to Central Asia, India, Iran, Iraq and Jordan. The mass of books and correspondence that he collected during his lifetime are distributed among collections in Britain and his homeland of Hungary. Within the collection bequeathed to the Library of the Hungarian Academy of Sciences is a unique source of material including photographs, letters, documents, manuscripts, articles, offprints and reviews within the subjects of Indology, Iranian studies, Central Asian linguistics and archaeology and Oriental manuscripts. This important collection is discussed and presented here.