 After the rules of the Council of Trent in 1563, which promoted the cult to icons and altarpieces, many workshops arose in this Cantabrian "comarca".The highest peak is from the 17th century, from when much documentation exists.Some altarpiece-makers as Simón de Bueras, Juan de Alvarado or Bartolomé de la Cruz reached great prestige and were called to work in La Rioja, Castile and the Basque Country.