They are hanging on the walls of Realfagsbygget ("STEM-building") at the Norwegian University of Science and Technology (NTNU).

Best picture I could find: https://koro.no/content/uploads/2020/04/55-417x550.jpg (some of them not burned yet)

From the end of the long album here: https://koro.no/prosjekter/ntnu-trondheim-norges-teknisk-nat...

My favorite art installation in that building is a huge Foucault pendulum. Always had to wait for it to knock over a peg when walking past.