Henry II of Castile, also known as Henry of Trastámara, from the Latin “Tras Tamaris” (or beyond the Tambre River), King of Castile and León (1366–1367, 1369–1379) was the first king of the Trastámara Dynasty. In summary, it was a minor branch of the house of Burgundy (or an “Iberian extension” of it), with presence in the kingdoms of Castile, Aragon, Navarre, and Naples. Most notably, it began playing an essential role in the kingdom of Castile, but after the Compromise of Caspe, its power extended decisively to the kingdom of Aragon (1412). Henry II was the illegitimate son of Alfonso XI and his lover Leonor de Guzmán. He waged a civil war against his stepbrother, Peter I, legitimate heir to the throne, as the son of Alfonso XI and Maria of Portugal, Queen of Castile. Henry’s determination to be recognized as king led him to employ the arts in a campaign to discredit his stepbrother and tarnish his image, portraying himself as a defender of the faith with the right to rule. He built the Royal Chapel (1371) in the main church of Córdoba (today’s Mosque/Cathedral) for the burial of his father and grandfather, Ferdinand IV, in order to underscore his connection to the royal line, and refurbished the Puerta del Perdón (Gate of Forgiveness) in 1377, the main entrance to the church, for use as a dramatic stage for public events.