The Carta Puebla or Fuero of Brañosera, is considered one of the most relevant documents in the history of the 9th century in the Iberian Peninsula, and the documentary gives voice to the testimony of the following historians and specialists: Pascual Martínez Sopena, Félix J. Martínez Llorente, Irene Ruiz Albi, Carlos Belloso Martín, José Ángel García de Cortázar, Juan José García González, Cristina Párbole Martín and Fernando Cuevas Ruiz.
