King Juan Carlos I was the King of Spain from 1975 until his abdication in 2014. He played a crucial role in Spain's transition to democracy after the end of the dictatorship of Francisco Franco. His leadership helped stabilize the country and foster a new era of political freedom. Born on January 5, 1938, in Rome, Italy, Juan Carlos was educated in Spain and abroad. He became king following Franco's death and was instrumental in establishing a constitutional monarchy. His reign saw significant social and economic changes in Spain, making him a key figure in the nation's modern history.