Baltasar Lopes , in full Baltasar Lopes da Silva, Baltasar also spelled Baltazar, pseudonym Osvaldo Alcântara (born April 23, 1907, Calejão, São Nicolau, Cape Verde Islands—died May 28, 1989, São Vicente, Cape Verde), African poet, novelist, and short-story writer, who was instrumental in the shaping of modern Cape Verdean literature.

Lopes was educated at the University of Lisbon, where he took a degree in law and in Romance philology. He then returned to Cape Verde and became a high-school teacher and later principal of the Liceu Gil Eanes in São Vicente (retired 1972). His one novel, Chiquinho (1947), written in Portuguese, re-creates the experiences of a Cape Verdean who grows up to understand that, in his land, life is a prolonged tragedy given meaning by the assertion of human courage, unselfishness, and dignity. Chiquinho, marking the beginning of realism in the Cape Verdean novel, is now a classic.

Lopes’s poems have been published in journals in Cape Verde, Portugal, and Brazil. In 1936 Lopes and two of his friends founded the journal Claridade (“Clarity”), which helped launch a movement that opposed colonialism and sought to promote Cape Verdean culture. His published nonfiction includes Cabo Verde visto por Gilberto Freyre (1956; “Cape Verde as Seen by Gilberto Freyre”), a study of Cape Verdean culture, and The Creole Dialect of Cape Verde (1957). He also wrote a number of essays on culture and ethnology and edited an anthology of contemporary Cape Verdean fiction (1960). In 1992 the Cape Verdean government introduced the 500 escudo currency bill with Lopes’s likeness on it.