Then came the Portuguese succession crisis of 1580 and, with it, the Iberian Union. The union ended with the Portuguese Restoration War, but the Marquesses of Vila Real, then owners of the Avelar estate, supported the right of the Spanish Kings to the Portuguese throne. Because of this, King John IV of Portugal accused them of treason, and had their properties and riches confiscated, including the Avelar estate. Those confiscated goods were later passed on to the House of the Infantado, created by King John IV himself as an appanage for the second eldest son of the Portuguese monarch.