House of Braganza great difficulty under the reign of King João II. By the tenure of the third duke, Fernando II, the House of Braganza was undoubtedly one of the greatest noble houses of Portugal and Iberia as a whole. Fernando II continued the House's legacy of acquisition and gained the title of Duke of Guimarães. To the Duke and the House's downfall, however, King João II's reign concerned itself with the royal consolidation of power and the diminishment of the nobility. In his mission to centralize power, the King executed many nobleman of the great houses of Portugal, alongside confiscating their properties
Fernando II, Duke of Braganza focused on diminishing the powers of the two most powerful noble houses in the kingdom, House of Beja and Viseu and the House of Braganza. King John II accused his first cousin, Diogo I of Beja and Viseu (brother-in-law of Fernando II), of high treason and had him brutally executed. Soon after, the King also accused his second half-cousin, Fernando II of Braganza, of high treason and had him executed at Évora in 1483. Afterwards, the assets of the House of Braganza were confiscated and the family fled to Castile. The family returned in 1498 and had all their property