DE NE DE promotes recognition of the Ukrainian cultural heritage of the Soviet period and emphasizes its value. Soviet art and architecture in Ukraine have always been stigmatized and not recognized as important historical and cultural artifacts of the past era. Since 2015, so-called "decommunization laws" have been in force in Ukraine, designed to condemn totalitarian ideology. And since ideology cannot be separated from works of art of that period, many of them were destroyed. 

The "Yellow Line" project is a documentation of objects of architectural and monumental art heritage of the 20th century on the territory of Donbass region. In 2018, the "Yellow Line" project revealed the value and uniqueness of non-obvious objects of cultural heritage, which were not recognized in the same way. Today, most of these cities are destroyed and occupied by the russian army, and the documentation of the "Yellow Line" project remains almost the only evidence of the unique sights of the past.