Mário de Sá-Carneiro was a Portuguese poet and writer born on May 19, 1890, in Lisbon. He is known for his association with the Modernist movement in Portugal and his close friendship with fellow writer Fernando Pessoa. Sá-Carneiro's work often explores themes of existentialism and the complexities of human emotions. He published several influential works, including the novel A Confissão de Lúcio and various poetry collections. His writing style is characterized by its innovative use of language and vivid imagery. Sá-Carneiro struggled with mental health issues and tragically took his own life in 1916, leaving a lasting impact on Portuguese literature.