Fernando AntÃ nio Nogueira Pessoa ( Lisbon , 13 June 1888 - Lisbon , 30 November 1935 ) , more known as Fernando Pessoa , was a Portuguese poet and writer . Fernando AntÃ nio Nogueira de Seabra Pessoa , known mainly as Fernando Pessoa ( ; June 13 , 1888 in Lisbon , Portugal â '' November 30 , 1935 , Lisbon ) , was a Portuguese poet , writer , literary critic and translator , one of the most significant literary figures of the 20th century and one of the greatest poets of all time .