The landlocked Principality of Andorra is one of the smallest states in Europe, nestled high in the Pyrenees Mountains between the French and Spanish borders. For 715 years, from 1278 to 1993, Andorrans lived under a unique co-principality, ruled by French and Spanish leaders (from 1607 onward, the French chief of state and the Spanish bishop of Seu d'Urgell). In 1993, this feudal system was modified, with the titular heads of state retained, but the government transformed into a parliamentary democracy. In the late 20th century, Andorra became a popular tourist destination. An estimated 10 million people visit each year drawn by the winter sports, summer climate, and duty free goods. Andorra has also become a wealthy international commercial center because of its banking facilities, low taxes, and lack of customs duties. However, recent economic hardships have required Andorra to start taxing foreign investments and to implement stricter economic policies. Andorra is not a member of the European Union, but enjoys a special relationship with it and uses the Euro as its national currency.