By this paper, the author is doing a general overview of the history of the research of archaeological sites from 8th–9th centuries in the north of the lower Danube. Based on analysing publications we may place on record that through the past 6–7 decades Romanian archaeology has made outstanding progress in knowing of historical realities. Romanian archaeological school through the impulse given by I. Nestor brings considerable contributions to the reconstitution of the history of the early medieval century. From the total number of the archaeological sites of the 8th–9th centuries attested on the Romanian territory only a small number, about 250 settlements and cemeteries (Map) were investigated through the preventive and systematic researches, but integrally being discovered only a few of them (settlements in Comana de Jos, Braşov county, Fundu Herţii, Botoşani county, Izvoare-Bahna, Neamţ county, Dodeşti, Vaslui county, Poiana, Botoşani county and cemeteries from Chişcani, Brăila county, Obârşia Nouă, Olt county, Ocna Sibiului, Bratei, Sibiu county). For a better knowing of this period we need both an integral publication of the archaeological discoveries on the Romanian territory and opening of new archaeological grounds while the comparison of these discoveries with archaeological realities from all the regions in the north of the Lower Danube will allow the reconstitution of the historical picture of the 8th–9th centuries.