The document discusses four religious-military orders in Spain:
1) The Order of Calatrava, founded in 1158 to defend Christianity against Islam from their fortress in Calatrava. They grew in power and wealth over centuries until being annexed by the Crown.
2) The Order of Santiago was the most prestigious and elitist order, granting nobility, and leaving their mark through important buildings. Founded in the 12th century to support the Reconquest.
3) The Order of Alcántara played a large role in defending the border of the Kingdom of León in Extremadura against Islam from the 10th century.
4) The Order of Montesa was