RosalÃ a Castro de MurguÃ a better known as RosalÃ a de Castro ( 24 February 1837 â `` 15 July 1885 ) was a Galician writer and poet . MarÃ a RosalÃ a Rita de Castro , simply known as RosalÃ a de Castro ( ; 24 February 1837 -- 15 July 1885 ) , was a Galician romanticist writer and poet .