This app allows you to see where the Church of Olav the Holy was allegedly located. In AR, the app displays the church at a 1:1 scale on-site inside the "Trondheim Folkebibliotek." You can gaze at the church from the outside or meander inside to explore the interior.
In addition to the church, you can view other objects from different periods in history that are also associated with the library. You can interact with any of these objects to read more about them or inspect a 3D model.