The Mothers of the Plaza de Mayo (Spanish: Asociación Madres de Plaza de Mayo) is an association of Argentine mothers whose children were "disappeared" under the military dictatorship of the 1970s.

The Grandmothers of the Plaza de Mayo (Spanish: Asociación Civil Abuelas de Plaza de Mayo) is a related organization with similar origins and aims.

On 10 December 2003, the Grandmothers' president, Estela Barnes de Carlotto, was awarded a UN Human Rights prize.

The name of the organizations comes from the Plaza 25 de Mayo in central Buenos Aires, where the bereaved mothers and grandmothers first gathered.

See: Dirty War

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