Cláudio Manuel da Costa (June 4, 1729 – July 4, 1789) was a Brazilian poet and musician, considered to be the introducer of Neoclassicism in Brazil.

He wrote under the pen name Glauceste Satúrnio, and his most famous work is the epic poem Vila Rica, that tells the history of the homonymous city, nowadays called Ouro Preto.

Some claim that he had connections with the Illuminati, an Enlightenment-oriented secret society created in Bavaria that has influenced numerous revolutions.

He founded in Ouro Preto a Neoclassic literary academy called "Colônia Ultramarina" ("Ultramarine Colony") in 1768, where he wrote many of his poems and performed the theatre play O Parnaso Obsequioso.

According to studies made in the mid-20th century, the preface of Gonzaga's Cartas Chilenas (Chilean Letters) was written by Costa.