The Cartularies belong to a monastry in the locality of Valpuesta, in the province of Burgos. They contain a series of documents which date back to the 12th century. These, in turn, are a copy of other documents, the most ancient of which can be traced to the 9th century.
The Origin of the Spanish language
The Cartularies are a visigotic code composed of 113 pages and transcripted by 32 different amanuenses. The manuscript is written in a very late form of Latin in which, however, can be found elements of Hispanic Romance Dialect that resemble the modern Castilian, and is said to be the source of the origins of the Spanish language. This dialect is the first written testimony of its kind, even if its autenticity is still disussed among the experts.
The pages are made of leather, and because of that in Burgos the Cartularies are named Becerro, which means calf.
Among the themes that can be found in the Cartularies the most prominent are those who deal with donations and other types of contracts; the most ancients date back to 804, 844, 864, 875.
Today they can be found in the National Archives of Spain.