Hungary is located in Central Europe. It has a population of 10 million and Budapest is the capital city. Hungary has a long and complex history, starting as part of the Roman Empire and experiencing periods of rule under the Huns, Ottoman Empire and Austria-Hungary. In the 20th century, Hungary lost significant territory as a result of World War I and the Treaty of Trianon. Today, Hungary is a parliamentary democracy with a mainly ethnically Hungarian population that speaks the Hungarian language.