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This reminds me of an art installation at the university in Trondheim, Norway. It's using a glass ball as a lens to burn holes in a tin plate. Every year the tin plate is changed and displayed on the wall inside the university.

https://www.trondheim.no/en/art/art-in-public-spaces/art-sun...

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Cool! Are there any pictures available of the tin plate after the year is completed?

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.

There's a similar work in San Francisco: A solar totem by Charles Sowers

https://www.sfartscommission.org/our-role-impact/press-room/...

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