El Cantar de mio Cid shows signs of being designed for oral transmission. For example, the poem ends with a request for wine for the person who has recited it (Es leido, dadnos del vino).On the other hand, some critics (known as individualists) believe El Cantar de mio Cid was composed by one Per Abbad (in English, Abbot Peter[4]) who appears to be credited as the writer of the work in a colophon to the text. It has been suggested that the poem, which is written in Old Spanish, is an example of the learned poetry that was cultivated in the monasteries and other centers of erudition. However, Per Abbad puts the date 1207 after his name and current thinking is that his claim to have written the work has simply been copied along with the text of an earlier manuscript now lost. The existing copy forms part of a 14th-century codex in the Biblioteca Nacional de Espaa (National Library) in Madrid, Spain. It is, however, incomplete, missing the first page and two others in the middle. For the purposes of preservation, it is not normally on display.