Sure, people have found all sorts of rare things in Google Maps, but I think I have found the first example of a conservation treatment of an artwork in progress. The image above is of a conservation crew working on the Tony Smith sculpture, The Elevens Are Up from 1963 — this version being the first in an edition of three and owned by the Menil Collection. It looks like the conservators just took a break for lunch and left their stuff hanging on the scaffold.
Pretty nerdy, I know, but still cool.
Above is a version of the sculpture (either number two or three) when it was on view at Matthew Marks Gallery