The study gives an insight to the interwar life of Komárom/Komárno, situated on the two banks of the Danube River, cut into two parts by the overturn in 1919/20. The Treaty of Trianon divided Komárom, the uniform city regarding administration and the language spoken into two parts. Local people perceived this as a severe trauma, as they were restricted from an important part of their living space. The division had brought decline for the Czechoslovakian part (left bank) and growth for New Komárom, on the Hungarian part (right bank). After 1919, the city of Komárno (on the left bank), with its decisively Hungarian-speaking citizens, became an ethnically and culturally divided city. Although the native Hungarians and the immigrant „Czechoslovaks” were able to cooperate in the everyday life, but holidays and other symbolic acts clearly indicated that there are two separated communities living side by side, but building their culture parallelly.