Wrocław is the capital of the Lower Silesia Voivodeship (Polish: dolnośląskie), which is located in western Poland. It is inhabited by nearly 640,000 people and is the fourth largest city in Poland. Wroclaw is located on the Odra River.
Kaliningrad is a city in today's Russia. It is located in the Kaliningrad oblast, a Russian exclave between Lithuania and Poland. Kaliningrad, formerly Königsberg, belonged to Prussia for several centuries and was the northeasternmost major city.
Prague is the capital of the Czech Republic and is inhabited by about 1.3 million people, which also makes it the most populated city in the country. It is on the river Vltava in the center of the country in the historical part of Bohemia.
Poland is a state in Central Eastern Europe and is home to approximately 38 million people. The country is the sixth largest member state of the European Union. The capital and biggest city of Poland is Warsaw. Poland is made up of 16 voivodships. The largest river in the country is the Vistula (Polish: Wisła).
Slovakia is a country in Central Europe, which is lived in by about 5.5 million people. The capital of the country is Bratislava (Pressburg). Slovakia has been independent since 1993. Before that it was part of Czechoslovakia for several decades.
The Czech Republic is a country in Central Europe with a population of about 10.5 million people. The capital and largest city of the country is Prague. In the Czech Republic lie the historical landscapes of Bohemia, Moravia and parts of Silesia. In 1918 the state of Czechoslovakia was formed, but the Czech Republic was not founded until 1993. The country has been a member of the EU since 01.05.2004.