Carlos de Borbón y Borbón-Parma

Don Carlos María Isidro Benito de Borbón was an Infante of Spain and the second surviving son of King Charles IV of Spain and of his wife, Maria Luisa of Parma. As Charles V, he was the first of the Carlist claimants to the throne of Spain. He was a reactionary who stridently opposed liberalism in Spain and the assaults on the Catholic Church. He claimed the throne of Spain after the death of his older brother King Ferdinand VII in 1833. His claim was contested by liberal forces loyal to the dead king's infant daughter. The result was the bloody First Carlist War (1833–1840). Don Carlos had support from the Basque provinces and much of Catalonia, but lost the war and never became king. His heirs continued the traditionalist cause, fought two more Carlist wars and were active into the mid-20th century, but never obtained the throne.