Infante Carlos of Spain (29 March 1788 – 10 March 1855) 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 Carlos V, he was the first of the Carlist claimants to the throne of Spain. He is often referred to simply as 'Don Carlos'. He was a reactionary who was angry with 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 (1833–40). Don Carlos had support from Basque provinces and much of Catalonia, but it was not enough, and he lost the war and never became king. His heirs continued the arc