Delighted to update BIBLIOTHECA INVISIBILIS (it’s been too long!) with a reference to El Indio by Manuel Blanco, a 19th century conceptual project.
You can see the notation for the work HERE
but for convenience, I cite from a paper (with a Facebook link) by Angelo Suarez:
It's worth noting Manuel Blanco's El Indio, if only to remind that conceptual art is way more than the two CA artists currently in the po-world news.