Ernesto Cardenal Martínez was a Nicaraguan Catholic priest, poet, and politician. He was a liberation theologian and the founder of the primitivist art community in the Solentiname Islands, where he lived for more than ten years (1965–1977). A former member of the Nicaraguan Sandinistas, he was Nicaragua's minister of culture from 1979 to 1987. He was prohibited from administering the sacraments in 1984 by Pope John Paul II, but rehabilitated by Pope Francis in 2019.

The Solentiname Islands are an archipelago towards the southern end of Lake Nicaragua in the Nicaraguan department of Río San Juan.