On 8 July 1388 the Treaty of Bayonne was signed between John of Lancaster and King JohnI of Castile, establishing the final dynastic reconciliation after the assassination of King PeterI. By this treaty, the Duke of Lancaster and his wife Constance renounced all their rights over the Castilian throne on behalf of the marriage of their daughter Catherine to the first-born son of King JuanI of Castile, the future HenryIII, who was granted as heir the dignity of Prince of Asturias. The title was granted with a ceremony.