Sweden, officially the Kingdom of Sweden (Swedish: Konungariket Sverige), is a country in Northern Europe. Its population is about 9.5 million, its official language is Swedish and its capital and largest city is Stockholm. It is a member of the European Union.
Sweden emerged as an independent and unified country during the Middle Ages (5-15th century). In the 17th century, it expanded its territories to form the Swedish Empire, which became one of the great powers in Europe until the 18th and 19th centuries. Since then, Sweden has been at peace and has maintained its neutrality throughout the wars that engulfed Europe in the 19th and 20th centuries, including the two World Wars.
Sweden is currently ruled by a constitutional monarchy, with King Carl XVI Gustaf as the head of state and the Prime Minister as the head of government. It is a highly developed country with high standards of living, income equality, education and healthcare.