LTVienas iš pirmosios Lietuvos Respublikos jaunosios istorikų kartos atstovų Konstantinas Avižonis 1933–1934 metais išvyko ieškoti istorinių dokumentų Lenkijos archyvuose. Nesant diplomatinių ryšių ir tarp abiejų valstybių tvyrant „šaltojo karo“ atmosferai tai buvo labai reta galimybė, kuria pasinaudojo lietuvių istorikas. Devynių mėnesių darbo Krokuvos archyvuose ir bibliotekose rezultatas – didžiausia nepriklausomoje Lietuvoje dar spėta išleisti monografija „Bajorai Lietuvos valstybiniame gyvenime Vazų laikais“. Ši publikacija – tai K. Avižonio ataskaita apie darbą Lenkijos archyvuose.
ENKonstantinas Avižonis (1909-1969) was one of the first Lithuanian historians who went to the archives in Poland after 1920 when diplomatic relations between the two states were severed. He received PhD at the University of Berlin and began to explore terra incognita in the Lithuanian historiography - the period after the Union of Lublin, 1569. K. Avižonis wrote the report about his work in the archives and libraries of Poland (mostly in Krakow). There he found a large amount of historical documents. Instructions, testaments, inventories, correspondence, trial decisions, memoirs, biographies etc were valuable sources which enabled the historian to evaluate social, economic and cultural life of the nobility. This material served as a basis for the greatest work in the Lithuanian historiography in 1918-1940's - a monograph which was written by K. Avižonis about the Lithuanian nobility during the era of the Grand Dukes of Lithuania and the Kings of Poland Vasas. This publication is dedicated to the 100th anniversary of this prominent historian.