House of Trastámara
The house Trastámara was a dynasty of kings in the Iberian Peninsula, Castile from 1369 to 1504, the lands of the Crown of Aragon 1412-1516, Navarra 1425-1479 Naples and reigned from 1442 to 1501. The name comes from the founder of the dynasty, King Henry II of Castile, who appeared as Count of Trastámara before his accession to the throne in 1369.
Henry of Trastámara was an illegitimate son of King Alfonso XI. and half-brother of Peter the Cruel, he could displace in years of struggle. His grandson, Ferdinand was elected in 1412 in Compromise of Caspe King of Aragon (Castile stayed with his elder brother's descendants). His son John II of Aragon married in 1425, the Queen of Navarre, which he ruled until 1479. 1442 had conquered Johanns brother Alfonso V of Naples.
John's son was Ferdinand the Catholic, who married Isabella I of Castile from the older branch of the family and thus the union of Castile and Aragon ushered in the Kingdom of Spain. Through the marriage of their daughter Joanna the Mad with Philip the Fair finally got the new kingdom in the hands of the Habsburgs.
The time of the dynasty Trastámara was for the Iberian Peninsula a time of strengthening the monarchy and the state agreement, the colonial expansion after the discovery of America, but also the economic development and the beginning of the rise of the bourgeoisie.