The article intends to establish which images of East Prussia and its local population were maintained and what kind of relations with the “German heritage” was formed in the documents of the official military and civil authorities in Kaliningrad Oblast in the period of 1945 to 1950. The question of the impact of the cultural uniqueness of East Prussia made on the official propaganda-supported approach to East Prussia and the local population is raised. The author demonstrates that the said approach did not always coincide with the approach that was forming due to the daily social interaction between the newcomers and the old “German” residents with their cultural heritage.