Antônio Frederico de Castro Alves (March 14, 1847 – July 6, 1871) was a Brazilian poet and playwright, famous for his abolitionist and republican poems. One of the most famous poets of the "Condorism", he won the epithet of "O Poeta dos Escravos" ("The Poet of the Slaves").He is the patron of the 7th chair of the Brazilian Academy of Letters.