Mezhyrich is an Epigravettian open air base camp, in the Middle Dnieper basin, dated to 14.9-14,3 ka 14 C BP. During the second stage of research from 1976 to 1989 an international group of specialists under supervision of M. Gladkikh-the Head of the Department of Archaeology, Ethnography and Museology of T. Shevchenko National University of Kyiv, carried out the excavations and interdisciplinary ... [Show full abstract] research of the site. As the result in 1976 fourth mammoth bone dwelling and a field objects around it were opened. The fourth dwelling was partially excavated and left in place for the purpose of a future museumification. An exploration of the cultural layer of the dwelling unit revealed a number of interesting finds and field objects. The stratigraphic sections within this trench revealed several stages of functioning of this object and several layers of human activity. Since 2018, the Dwelling 4 has been explored by an expedition involving organizations such as the Department of Archeology and Museum Studies at Taras Shevchenko National University of Kyiv (P. Shydlovskyi), National Museum of Natural History, France (S. Péan) with the involvement specialists in the field of zooarchaeology, geology, geomorphology, etc. As the current state of affairs requires a new description of the dwelling elements, one of the goals of the 2018-2019 study was to conduct stationary studies of the filling of the dwelling. This works have to be continue in order to obtain data on structural features and the degree of preservation of cultural remains inside the dwelling, and to carry out restoration work to provide a basis for future museumification of the object.