The doctor Erik Waller (1875-1955) gained an international reputation as perhaps the leading collector of books of modern times. His collection of books includes approximately 20,000 titles. This is one of the world’s most extensive and valuable collections of literature on the history of medicine. The manuscript collection comprises 38,000 original manuscripts, written mainly by physicians and scientists, but also by individuals working in other fields. In addition to these collections, there is also a coin collection which is held at the Uppsala University Coin Cabinet.