 The monks received in exchange the property of the barren lands with the condition of having to cultivate them.The most ancient repopulation monasteries were those of "San Vicente de Fístoles" (in Esles de Cayón) and "Santa María del Puerto" (in Santoña), the latter having a large jurisdictional scope that lasted until the 16th century; however, from the 11th century on it was forced to depend on the monastery of "Santa María la Real" in Nájera (La Rioja) by royal order, and so it remained until the 19th century when the "Desamortización" caused the dissolution of the monasteries.In the documents of the 11th century, the "comarca" of Trasmiera appears as a geographic and administrative entity.