Czech Republic Capital and largest city : Prague Official language : Czech Ethnic groups : 64% Czechs 26% unspecified 5% Moravians 1.4% Slovaks 0.4% Poles Religion : 88.5% - Non-religious or undeclared 10.4% - Roman Catholic 1.1% - Other Demonym : Czech Area : 78,866 km2 Population : 10,553,948 Currency : Czech koruna (CZK) Time zone : CET (UTC+1) Drives on the : Right Calling code : +420 Patron saint : St. Wenceslaus ISO 3166 code : CZ Internet TLD : .czc

Poland Capital : Warsaw Official language : Polish Ethnic groups : 98% Polish 2% Others Religion : 87.58% Roman Catholic 7.10% Opting out of answer 1.28% Other faiths 2.41% Irreligious 1.63% Not stated Demonym(s) : Polish Area : Total 312,696 km2 Population : 38,433,600 Currency : Polish złoty Driving side : Right Calling code : +48 ISO 3166 code : PL Internet TLD : .pl Slovakia Capital : Bratislava Official Language : Slovak Ethnic Groups : 80.7% Slovaks 8.5% Hungarians 2.0% Roma 0.6% Czechs 0.6% Rusyns 0.1% Ukrainians 0.1% Germans 0.1% Poles 0.1% Moravians 7.2% Unspecified Demonym(s) : Slovak Area : Total 49,035 km2 Population : 2018 estimate - 5,445,087 Currency : Euro Driving side : right Calling code : +421c Patron saint : Saints Cyril and Methodius Our Lady of Sorrows ISO 3166 code : SK Internet TLD : .sk and .eu Hungary Capital : Budapest Official language : Hungarian Ethnic groups : 98.3% Hungarians 3.2% Romani 1.8% Germans 1% not declared Religion : 54.3% Christianity 39% Catholicism 13.8% Protestantism 3.3% other Christians 0.2% Orthodox Church 0.1% Judaism 0.05% Buddhism 0.01% other 18.2% not religious 27.2% unanswered Demonym(s) : Hungarian Area : Total 93,030[7] km2 Population : 9,797,561 (2017) Currency : Forint (HUF) Driving side : Right Calling code : +36 Patron saint : Saint Stephen ISO 3166 code : HU Internet TLD : .hu Austria Capital : Vienna Official and national language : Austrian German Recognized languages : Hungarian (41,000) Slovene (25,000) Burgenland Croatian (19,500) Ethnic groups : 82.3% Austrians : 3.8% Germans : 2.4% Serbs : 2.3% Turks : 2.0% Romanians : 1.1% Hungarians : 6.1% other ethnic groups Demonym(s) : Austrian Area : Total 83,879 km2 Population : 8,857,960 Currency : Euro (€) Driving side : Right Calling code :+43 ISO 3166 code :AT Internet TLD :.at[d]