This Day in History: 1371-03-31

On 31st March 1371, in Hertford Castle, Constance, second wife of John of Gaunt, lord of Pontefract, gave birth to a girl, Catherine,  who was to become Queen Consort and later Regent of Castile by marriage to King Henry III of Castile. Although failing to secure his continued rule of Castile and Leon through his wife, Gaunt’s daughter’s marriage in some way realised his dynastic ambitions.