Jump into times long past and experience Lüneburg places and their history from a new perspective. Project the past into the present using augmented reality.With the Zeitsprung-Lüneburg app, places can be experienced again in their former dimension, the stories about them come alive. Augmented Reality is the technology that makes it possible to fade historical views into the live image of the camera. For this purpose, city gates, walls, ramparts, buildings, churches and other buildings are elaborately three-dimensionally reconstructed on the computer in order to be able to display them photorealistically and in perspective at the time jump locations.The "leaps in time" are possible at up to 60 locations in Lüneburg. The user is guided by fading into the live image of his camera or alternatively by a map.In addition to the historical views, the app can play audio files or display info texts.The user is guided with built-in help for easy operation. This can be deactivated if the operation is understood. In addition, more detailed instructions are available at any time. A link to the instruction video can be called up with an existing internet connection.The app itself does not require an internet connection and runs on tablets and smartphones.New: If there is an internet connection when the app is started, a connection to an update server is established. If available, new locations, texts and audio data will be loaded.Responsible for image content, audio content and text of the app: Wolfgang GrämerResponsible for app functions: Michael Dahl, ARAMM.deHomepage of the app: www.zeitsprung-lueneburg.de