History of Iberia (airline) History of Iberia (airline) Iberia Líneas Aéreas de España, S.A. ("Iberia Airlines of Spain" in English), usually shortened to Iberia, is the largest airline of Spain, based in Madrid. The years following World War I saw a large advancement in aircraft technology with concomitant increase in possibilities for rapid connections between international business concerns. Germany had many business concerns, particularly in Africa and South America, but was still reliant on ships and land routes to reach these. In order to circumvent the Treaty of Versailles stipulation that prohibited German aircraft access to flying over France, agents in Spain explored the
Coat of arms of the King of Spain the monarchy. In 1931, the royal arms was revised to incorporate what had been hitherto the "national arms" into the royal arms and to replace the former lesser arms of the King (i.e. quarterly Castille and Leon). The monarchy would later be abolished later that year. When don Juan Carlos, grandson of Alfonso XIII (the last king of Spain), was chosen to be the successor of General Francisco Franco, the arms adopted for his use in 1971 as Prince of Spain was quarterly Castille, Leon, Aragon, and Navarre. The heraldic achievement also included the collar of the Order of the