The Czech Republic ( ; , , is a landlocked country in Central Europe bordered by Germany to the northwest and west, Austria to the south, Slovakia to the east and Poland to the northeast. Prague, the capital, is the largest city, with 1.3 million residents. The Czech Republic includes the historical territories of Bohemia and Moravia, and Czech Silesia. The Czech state, known in English as Bohemia until the early 20th century, was formed in the late 9th century as the Duchy of Bohemia under the Great Moravian Empire. After the fall of the Empire in 907, the centre of power transferred from Moravia to Bohemia under the Přemyslids. In 1004, the duchy was formally recognized as part of the Holy Roman Empire, becoming the Kingdom of Bohemia in 1212, and reaching its greatest territorial extent in the 14th century. The King of Bohemia did not rule only Bohemia itself, but also other lands, which formed together the so-called Crown of Bohemia, and he had the right to elect the Holy Roman Emperor. In the Hussite wars of the 15th century driven by the Bohemian Reformation, the kingdom faced economic embargoes and defeated five crusades proclaimed by the leaders of the Roman Catholic Church and organized mainly by the emperor and princes of the Holy Roman Empire. Following the Battle of Mohács in 1526, the whole Crown of Bohemia was gradually integrated into the Habsburg Monarchy alongside the Archduchy of Austria and the Kingdom of Hungary. The Bohemian Revolt (1618–20) against the Catholic Habsburgs led to the Thirty Years’ War, after which the monarchy consolidated its rule, re-imposed Catholicism, and adopted a policy of gradual Germanization. With the dissolution of the Holy Roman Empire in 1806, the Bohemian Kingdom became part of the Austrian Empire. In the 19th century, the Czech lands became the industrial powerhouse of the monarchy and the core of the Republic of Czechoslovakia, which was formed in 1918 following the collapse of the Austro-Hungarian Empire after World War I. Czechoslovakia was occupied by Germany in World War II, becoming liberated in 1945 by American and Soviet forces. The Communist Party of Czechoslovakia won the 1946 elections. Following the 1948 coup d’état, Czechoslovakia became a single-party communist state under Soviet influence. In 1968, increasing dissatisfaction with the regime culminated in a reform movement known as the Prague Spring, which ended in a Soviet-led invasion. Czechoslovakia remained occupied until the 1989 Velvet Revolution, when the communist regime collapsed and a multiparty parliamentary republic was formed. On 1. January 1993, Czechoslovakia peacefully dissolved, with its constituent states becoming the independent states of the Czech Republic and Slovakia. The Czech Republic is a developed country with an advanced, high income economy and high living standards. The UNDP ranks the country 15th in inequality-adjusted human development. The Czech Republic also ranks as the 11th-most peaceful country, while achieving strong performance in democratic governance. It is a member of the European Union, NATO, the OECD, the OSCE and the Council of Europe.