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The interwar period (1918–1939) brought new geopolitical system and economic and political problems, and the concept of Central Europe took a different character.
The centre of interest was moved to its eastern part – the countries that have (re)appeared on the map of Europe: Czechoslovakia, Hungary and Poland.
According to Emmanuel de Martonne, in 1927 the Central European countries included: Austria, Czechoslovakia, Germany, Hungary, Poland, Romania and Switzerland.
The author use both Human and Physical Geographical features to define Central Europe.
After the war, the Eastern part of Central Europe was placed at the centre of the concept.
At that time the scientists took interest in the idea: the International Historical Congress in Brussels in 1923 was committed to Central Europe, and the 1933 Congress continued the discussions.
The German term denoting Central Europe was so fashionable that other languages started referring to it when indicating territories from Rhine to Vistula, or even Dnieper, and from the Baltic Sea to the Balkans.
He explained that between the 11th and 15th centuries not only Christianization and its cultural consequences were implemented, but well-defined social features emerged in Central Europe based on Western characteristics.