Collections of cultural artifacts are the core of the source base of eth-nographic research. The scientific potential of such collections is not com-pletely utilized, for a number of reasons. Little-known sources include ob-jects of life and art of Ukrainians of the Austro-Hungarian Empire, which were compiled by Czech self-taught ethnographer František Řehoř (1857–1899) in the late nineteenth century. This hidden collection is in the funds of the Ethnographic Museum in Prague today. It contains more than 2,000 items purchased in the cities and villages of Eastern Galicia and Bukovyna. A large group of works (about 300 items) consists of painted Easter eggs “pysanky”, dating from 1880–1890. Among them there are several artifacts, the exact place of origin of which is documented in the inventory cards, or in the inventory books, or on the Easter eggs themselves (inscrip-tion with the name of the settlement). Currently, the Czech-Ukrainian team, made up of employees of the Ethnographic Museum in Prague and re-searchers from the Institute of Ethnology of the National Academy of Sciences of Ukraine in Lviv, carries out a thorough attribution of the entire collection. Czech scientists accumulate all available information from scat-tered sources (records in inventory cards, inventory books and in the arc-hive of F. Řehoř). Ukrainian scientists find in museums of Ukraine properly attributed analogues. The state of preservation of Easter eggs from the collection of F. Řehoř is such that it allows to reconstruct the compositions of most arti-facts, despite the color burnout. Only a few Easter eggs cannot be recon-structed, of which only fragments of the shell remain (the Easter egg cracked when the egg contents dried). Attribution and analysis of the collection allows to expand know-ledge about the location of historic centers of Easter eggs painting, as well as local features of the painting: the options for dividing the egg surface into compositional sections, the graphic variability of motifs (geometric, phytomorphic, zoomorphic and skevomorphic forms), and about the pre-vailing color options. The work carried out by the international team is aimed at expanding knowledge about the peculiarities of the folk culture of Ukrainians of the XIX century and its` broad representation. A catalog of the entire F. Řehoř collection should be the final product of the collaboration.