Andorra, officially the Principality of Andorra (), also called the Principality of the Valleys of Andorra (), is a sovereign landlocked microstate in Southwestern Europe, located in the eastern Pyrenees mountains and bordered by Spain and France. Created under a charter in 988, the present principality was formed in 1278. It is known as a principality as it is a diarchy headed by two Co-Princesthe Catholic Bishop of Urgell in Spain, and the President of France. 

Andorra is the sixth-smallest nation in Europe, having an area of 468 km (181 sq mi) and a population of approximately . Andorra is the 16th-smallest country in the world by land and 11th-smallest country by population. Its capital Andorra la Vella is the highest capital city in Europe, at an elevation of above sea level. The official language is Catalan, although Spanish, Portuguese, and French are also commonly spoken. 

Andorra's tourism services an estimated 10.2 million visitors annually. It is not a member of the European Union, but the euro is the official currency. It has been a member of the United Nations since 1993. In 2013, the people of Andorra had the highest life expectancy in the world at 81 years, according to "The Lancet".
What is also known as the Principality of the Valleys of Andorra?
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Andorra
Andorra, officially the Principality of Andorra (), also called the Principality of the Valleys of Andorra 
988
Created under a charter in 988
1278
 Created under a charter in 988, the present principality was formed in 1278
two Co-Princes
it is a diarchy headed by two Co-Princes
Catholic Bishop of Urgell
it is a diarchy headed by two Co-Princesthe Catholic Bishop of Urgell
Spain
Catholic Bishop of Urgell in Spain
President of France
President of France. 
a diarchy
 it is a diarchy headed by two Co-Princes
Europe
Andorra, officially the Principality of Andorra (), also called the Principality of the Valleys of Andorra (), is a sovereign landlocked microstate in Southwestern Europe
sixth-smallest
Andorra is the sixth-smallest nation in Europe
468 km
having an area of 468 km (181 sq mi) 
Spain and France
bordered by Spain and France
Yes
located in the eastern Pyrenees mountains
unknown
unknown
Pyrenees
located in the eastern Pyrenees mountains
Yes
 is a sovereign landlocked microstate 