Viktoriia Serhiienko is a researcher at German Historical Institute Warsaw. In 2010, she has graduated from the department of History at Poltava National University. In 2014, she has completed her PhD studies at the history department of Taras Shevchenko National University of Kyiv and defended the thesis entitled “Formation and activity of the Orthodox Church brotherhoods of Left-Bank Ukraine (1864 – 1917)”. Her researches focus on the religious and social history of Central and Eastern Europe in the XIX – XX centuries. The last topic she is working on deals with the history of Russophile and Ukrainophile orientations in eastern Slovakia between the two world wars.