Jannis Kounellis, Untitled, 1969. 

In January 1967 Kounellis organized a solo exhibition in Rome at L’Attico, directed by Fabio Sargentini, where he exhibited twelve live horses. He relates that he was inspired by a phrase by André Breton in Le surrealisme au service de la revolution, according to which something could happen that was as impossible as the Tartars bringing their horses to drink at the fountains of Versailles.

(Source: museomadre.it)