Fernando Pessoa (1888-1935) was a Portuguese poet, writer, and philosopher. He is considered one of the most influential literary figures of the 20th century. Pessoa wrote under multiple heteronyms, or alternate identities, each with its own distinct style and subject matter. His works explored themes of identity, alienation, and the search for meaning in life. He was also a prolific translator, translating works from English, French, Spanish, and Italian into Portuguese. Pessoa's influence on modern literature is immense, and his works continue to be studied and celebrated around the world.