According to most scholars, it was written in the early fifteenth century by a monk of Alaón,[1] but at least one places its main composition towards 1154.
[2] It was first edited and published under the current description by José de la Canal in España Sagrada (46:323–29).
On folio 106r of the cartulary[3] in which the Fragmentum was found is preserved a marginal notice, in a thirteenth-century hand, indicating that a certain presbiter vel monacus (presbyter and monk) named Domingo wrote this codex during the episcopate of Raimundo Dalmacio, Bishop of Roda from 1078 to 1094, during the reign of Sancho Ramírez.
Whoever copied it into the cartulary left only one blank page (folio 104r), which was not sufficient for the whole text, even though the last paragraphs are written in very small letters.
[4] He incorrectly asserts that Sancho the Great passed on the kingdom of Sobrarbe and Ribagorza to his son Ramiro I, while in fact it was Gonzalo.