Our reference collection of papers on the microbiology of the built environment has a few papers on microbes and art. Microbes have both destructive potential and restorative applications, mostly in regard to frescoes and paintings.
However we haven’t talked much about using microbes as art, within the built environment.
Basically some imaginative folks created a living bacterial billboard in an abandoned building in order to advertise a new movie. You can see a very short video describing the project and with a time-lapse of the growth.