Spanish Monarch, Infante Don Juan de Borbón, Count of Barcelona, his full name being Juan Carlos Teresa Silvestre Alfonso de Borbón y Battenberg , was the fourth son and designated heir of King Alfonso XIII of Spain, the monarch replaced by the Second Spanish Republic, and father of the present King of Spain, King Juan Carlos, under whom a constitutional monarchy was be restored.On October 12, 1935, in Rome, he married Maria Mercedes Borbón y Orleans (also known as Doña María de las Mercedes de Borbón y Orleans, or as Princess Maria de las Mercedes Cristina Genara Isabel Luisa Carolina Victoria of Bourbon Two-Sicilies).They had four children:1-Infanta Doña Pilar, Duchess of Badajoz (María del Pilar Alfonsa Juana Victoria Luísa Ignacia de Todos los Santos), born 1936.2-Don Juan Carlos I, King of Spain (Juan Carlos Alfonso Victor María), born 1938.3-Doña Margarita, Duchess of Soria, 2nd Duchess of Hernani (Margarita María de la Victoria Esperanza Jacoba Felicidad Perpetua de Todos los Santos), born 1939.4-Infante Don Alfonso of Spain (Alfonso Cristino Teresa Angelo Francisco de Asis y Todos los Santos), born 1941.After living in Rome, he moved his residence to Estoril, Portugal. To assert his claim to the throne, he used the title of Count of Barcelona, a sovereign title associated with the Spanish Crown.When Fascist General Francisco Franco changed the form of government in Spain to a monarchy, he characterised it as a reinstitution. However, fearing that Don Juan would be too liberal and roll back the falangist fascist state, Franco passed over Don Juan, who would have been king if the monarchy had been continued uninterrupted, in favor of his son, Juan Carlos, who Franco believed would be more likely to continue the Francoist fascist state after his death. Juan Carlos surprised many by his support of democratizing Spain.The Count of Barcelona renounced his claim to the throne in 1977, forty-six years after Spain had been declared a republic, eight years after being deposed by Franco, and two years after his son had become King Juan Carlos. In return, his son officially granted him the title of Count of Barcelona, which he had claimed for so long.He died after a very long battle with throat cancer (in the larynx), and was buried as Juan III, with royal honors, in the Royal Crypt of the Monastery of San Lorenzo del Escorial, near Madrid.