In the literature on the heritage of the post-migration areas of south-eastern Poland, as well as in the nationwide information space, too little attention is paid to the Ukrainian legacy. Although since 1989, the topic has been discussed more often and more freely, and the knowledge in this area has significantly expanded, still the issue of Ukrainian heritage is underrepresented in scientific and journalistic narratives and public administration practices of eastern border regions Polish. Within the present borders of Poland, there are over a thousand post- Ukrainian localities, whose tangible and intangible heritage has been destroyed, forgotten, and repressed from social consciousness, it has become invisible. In this article we try to explain how this happened. We ask about the decisions, people, and events that caused the ‘Ukrainian’ in Poland to become a symbolic ‘after’ – ‘post-Ukrainian.’