Fernando António Nogueira Pessoa was a Portuguese poet, writer, literary critic, translator, publisher and philosopher, described as one of the most significant literary figures of the 20th century and one of the greatest poets in the Portuguese language. He also wrote in and translated from English and French.
Pessoa was a prolific writer, and not only under his own name, for he created approximately seventy-five others. He did not call them all pseudonyms because he felt that some did not capture their true independent intellectual life and instead called them heteronyms. These imaginary figures sometimes held unpopular or extreme views.