One of the outstanding figure of Ukrainian art studies in the XX century is Kateryna Mateiko (1910–1995). She began her career in 1939 as a researcher at the State Ethnographic Museum, the collection of which became part of the Museum of Ethnography and Applied Art (Lviv) later. In 1950–1980 she took an active part in field researches of all Ukraine. During them K. Mateiko collected folk clothing exhibits for museum and studied Ukrainian folk clothing as a unique phenomenon. One of the first scientific works by Kateryna Mateiko devoted to folk embroidery was the article «The Using of Traditional Clothing Elements in Modern Garment» (Lviv, 1963). In it, the scientist considered embroidery as a bright decor of Ukrainian folk clothing components, inextricably linked with the items` construction as well as the overall artistic sound of the whole ensemble of clothes. The idea about the originality of Ukrainian folk embroidery she had developed in her next works: in chapter «Clothing» to «Essays on the Histoty of Ukrainian Decorative and Applied Arts» (Lviv, 1969), «Ethnographic Zoning Principles of Ukrainian Folk Clothing» (Moskow, 1970), «Ethnographic Features of Boiko Clothing» (Moskow, 1972), «Local Features of Hutsul Clothing of the End of XIX –the beginning XX Centuries» (Uzhhorod, 1972) and others. However, the most complete K. Mateiko studies was presented in her monographs «Ukrainian Folk Clothing» (Kyiv, 1977) and «Ukrainian Folk Clothing: Ethnographic Dictionary» (Kyiv, 1996), which remain relevant today. In the first of them, the researcher paid special attention to women’s and men’s shirts decorated with embroidery. She noted the most characteristic seams for each of the Ukrainian ethnographic regions, their combination with each other, analyzed the features of ornamental schemes, noting the nomenclature of motifs and their colors. The second of them remains a valuable source of terms to designate the components of folk clothing, headwear, shoes, accessories, their parts as well as embroidered decor.