ENThe author characterizes the modern Ukrainian historiography about development of the Grand Duchy of Lithuania at Jagiellonian epoch in this work. He identifies two generations of researchers and marks an influences of the first generation on a investigation fild and a methodology of the second generation. The paper dills with an investigation potential for preparing and defending thesises on this scientific area. The author paies attantion to publications of sources and conceptual works too. [From the publication]