Aztec codex, Human sacrifice to honor the sun (16th century)
Théodore Géricault, Heads severed (1818)
Théodore Géricault, Anatomical pieces (1819)
Francisco Goitia, Cabeza de ahorcado (1958-1960)
Cindy Sherman, Untitled #342 (1999)
Francisco Goya, Grande hazaña! Con muertos! (Los desastres de la guerra #39) (1810-1820)
Jake and Dinos Chapman, Great Deeds Against the Dead (1994)
Unfortunately, in Mexico it's not longer about art, but about real people tortured by drug dealers, like the Aztecs did for religious reasons. Love this country!