Casimiro José Marques de Abreu (January 4, 1837 - October 18, 1860) was a Brazilian poet, novelist and playwright, adept of the "Ultra-Romanticism" movement. He is one of the most famous Romantic poets of the Ultra-Romanticism, due to the simple language of his poems.
He is patron of the 6th chair of the Brazilian Academy of Letters.
Casimiro José Marques de Abreu was born in January 4, 1839, in the city of Barra de São João (renamed "Casimiro de Abreu" in his honor in 1925), to rich farmers José Joaquim Marques de Abreu and Luísa Joaquina das Neves. He received only a basic education at Instituto Freeze, in Nova Friburgo, where he met and befriended Pedro Luís Pereira de Sousa. Following orders of his father, he moved to Rio de Janeiro in 1852 to dedicate himself to commerce, an activity which he hated.
With his father, he travelled to Portugal in 1853. There he began his literary career, writing for many journals (such as O Progresso and Ilustração Luso-Brasileira) and collaborating with Alexandre Herculano and Luís Augusto Rebelo da Silva, among others. During his stay in Portugal, he wrote his first works: the theater play Camões e o Jau (influenced by Almeida Garrett's poem Camões), the romance Carolina, published under feuilleton form, and the first chapters of a novel which he would never finish: Camila.
In 1857, he returned to Rio, where he became a collaborator for the journals A Marmota, O Espelho, Revista Popular and Correio Mercantil. While working for the latter, he met Manuel Antônio de Almeida and Joaquim Maria Machado de Assis.
In 1859, he published his most famous work, the poetry book As Primaveras (Springtimes). Its publication was financed by his father, although he disapproved Casimiro's literary vocation.
Suffering from tuberculosis, Casimiro returned to Nova Friburgo, and died at age 21 on October 18, 1860. ..