song of the mio cid is incorrectly written and should be written as "singing of the mio cid" being its meaning: song of the mio cid = sing of the mio cidEl Cantar de mio Cid is a Chanson de Geste anonymous depicting heroic exploits freely inspired in the last years of the life of the Castilian Knight Rodrigo Díaz the swords. It's the first long narrative work of Spanish literature in a romance language, and stands out for the high literary value of his style. It was composed according to the vast majority of the current criticism around the year 1200.