Gustavo Adolfo DomÃ nguez Bastida , better known as BÃ cquer , ( Seville February 17 , 1836 -- Madrid December 22 , 1870 ) was a Spanish post-romanticist writer of poetry and short stories . He is considered one of the most important figures in Spanish literature . Gustavo Adolfo DomÃ nguez Bastida , better known as Gustavo Adolfo BÃ cquer , ( February 17 , 1836 - December 22 , 1870 ) was an Spanish post-romanticist writer of poetry and short stories , now considered one of the most important figures in Spanish literature .