By the terms of Lady Wallace's bequest, the Wallace Collection is a closed collection (i.e. no works of art are added except in the most exceptional circumstances, such as completing an existing work of art).
There is, however, a small collection of pictures, prints and other works of art relating to the history of the Collection which is called the Hertford House Historic Collection.
The Wallace Collection's archives also contain documents relating to the Founders and the history of the museum. Visitors may see both these collections on request.