Answer:
The Third of May is one of the greatest testaments to the ___ ever painted.
Horrors of war
Explanation:
In the Third of May 1808, Francisco Goya commemorates the events surrounding the Madrid uprising against the French occupying forces. In it, he portrayed a poor laborer, who sacrificed himself for his nation, just as the crucified Christ did on the cross of Calvary. The Third of May was an anti-war painting, which decried man's inhumanity to his fellow human being. It showed that war was very horrific because of the atrocities committed by the players.