One of the first works in L.A. Memo: Chicana/o Art From 1972-1989 at LA Plaza de Cultura y Artes is “El Arte Chicano (Color)” (1974), a small, vibrant text painting by Roberto “Beto” de la Rocha (father of Rage Against the Machine frontman Zack de la Rocha). In graffiti-esque bubble letters, the work proclaims simply: “El Arte Chicano Existe” (Chicano Art Exists). The phrase is covered with the signatures of other Chicana/o artists, making the work a statement of collective solidarity. Given the rising profile of Latina/o art over the past several years — with a recent version of the Getty’s Pacific Standard Time initiative dedicated to the connection between Los Angeles and Latin America, and last week’s long-awaited opening of the Cheech Marin Center for Chicano Art & Culture in Riverside — it may seem like an obvious conclusion. However, the fact that de la Rocha felt that the existence of his art needed to be professed just affirms how different the cultural climate was in the US, and even in LA, 50 years ago.