Mexico gave the ex-voto its most vivid modern form: the retablo ex-voto, a small painting on tin that tells the whole story of the emergency and the rescue. The scene shows the moment of crisis, a fall, a fever bed, a runaway horse, a surgery, an assault survived; above or beside it appears the holy figure who intervened, Our Lady of Guadalupe, a locally venerated Christ, a favorite saint; and along the bottom runs a text naming the person, the date, the danger and the grace received. Painted by local artists for ordinary families from the eighteenth century onward, these votive tablets became a national archive of private catastrophe and gratitude.
Artists noticed. Frida Kahlo and Diego Rivera collected retablo ex-votos by the hundred, and Kahlo borrowed their format outright, painting her own disasters in votive form; through them the genre entered the museum, though its natural home is still a shrine wall. The painted panel is one member of a large family. Milagros, the small stamped metal charms of the same tradition, handle the same transactions in miniature, and Europe kept parallel customs, from Italian tablets marked PGR, per grazia ricevuta, to the wax limbs of Bavarian pilgrimage churches. Together they show the ex-voto adapting its media, tin, silver, wax, paint and marble, to whatever a household could afford, without ever changing the underlying contract.