Memento Wien is an online tool, optimised for devices such as tablets and smartphones, that offers information about the victims of the Nazi regime in the centre of Vienna. Using a map of the city, the mobile website makes visible the last-known addresses of those murdered as well as archival documents and photographs of people and buildings in the city. Users have the opportunity to interact with the history of their surroundings and learn more about the fate of the people who were persecuted.