The Esperanto Museum at the Austrian National Library is one of the world’s oldest language museums and one of the most important institutions of its kind. It collects and presents a range of different media and objects on the subjects of Esperanto and interlinguistics. The museum is closely linked, in terms of its subject matter, administration and location, to the Department of Planned Languages in which a total of around 500 planned language projects are documented.
You can find more information in the Museum Policy