Castilla y León is an autonomous community in north-western Spain. It was constituted in 1983, although it existed for the first time during the First Spanish Republic in the 19th century. León first appeared as a Kingdom in 910, whilst the Kingdom of Castile gained an independent identity in 1065 and was intermittently held in personal union with León before merging with it permanently in 1230. It is the largest autonomous community in Spain and the third largest region of the European Union, covering an area of 94,223 square kilometres (36,380 sq mi) with an official population of around 2.5 million.