The great Peninsular kingdoms. (introduction)

--During the 12th and 13th centuries,the Christians kingdoms on the Iberian Peninsula (Portugal, Castile and Leon, Navarre, and the Crown of Aragon) became more powerful.These kingdoms extendedtheir power by conquering Muslim territory.
--In Catile, the economy was bsed on wool and the nobles had great socila influence.At the same time, the Crown of Aragon became an important centre of trade with a powerful bourgeoisie.
--In the second half of the 14th century, a social and economic crisis affected Europe, including the Peninsular kingdoms. The power of the nobility grew in this period at the extense of the peasants.