Morro de Santo Antônio, Hill in central Rio de Janeiro, Brazil.

Morro de Santo Antônio is a low hill in central Rio de Janeiro whose sides are exposed dark grey and brown stone, most of the hill having been quarried away in the 1950s. Buildings stand on and against the remaining rock: a long white building with many small dark windows and a dark tiled roof, and beside it a white church with a curved gable, a small bell tower and a cross. A white banner and a rounded concrete structure with a tilted circular opening stand in front of the stone face.

During the twentieth century, much of the hill was removed to enable urban expansion projects in downtown Rio de Janeiro, including the construction of avenues and Eduardo Gomes Park.

At the summit stand the Convent of Santo Antônio and the Church of the Third Order of São Francisco, both representing important examples of Brazilian colonial religious architecture.

Access to the hill is available from Largo da Carioca, a busy central area in the city with public transportation connections and commercial establishments located in the vicinity.

The location was one of the earliest favela communities in Rio de Janeiro, sheltering Franciscan groups and impoverished families seeking refuge since the seventeenth century.