In 2022 the UEA endowed its archives to the Esperanto Museum at the Austrian National Library. The UEA archives comprise archival documents as well as considerable collections of posters, photographs and audiovisual media. Furthermore, selected books and periodicals of the Hector Hodler Library (BHH) were also transferred to Vienna. By March 2023 more than 3000 documents had been catalogued. Among those more than 300 posters and books have already been digitized and are freely accessible online. The presentation provides an illustrated overview of the operations and the transfer from Rotterdam, the acceptance and provision of the archives in Vienna, its contents as well as an outlook on envisaged projects in the near future.