Balkan–Danubian culture
The Balkan–Danubian culture was an early medieval archaeological culture which emerged in the region of the Lower Danube in the 8th century and flourished until the 11th century. In Bulgaria it is usually referred to as Pliska-Preslav culture, while in Romania it is called Dridu culture. It is better represented on the territory of modern-day Central and Northern Bulgaria although its probably spread north of the Danube as well due to the continuous extension of the First Bulgarian Empire over the territory of present-day Romania in Northern Dobrudzha. The Balkan–Danubian culture is  described as an early "Slavic-Bulgarian" culture, but besides Slavic and Bulgar elements it possesses also some "Romance" components but these elements only appear in the souther regions wich are todays southern Bulgaria, all of these elements heavely influenced by the Byzantine Empire. Notorious examples of this architecture are the Bulgarian early capitals of Pliska and Veliki Preslav, and also the Palace of Omurtag and the Murfatlar Cave Complex. Some scholars partition this culture in two subgroups. Because in the south the Byzantine influence was more spectacular, the northern finds are enterely Slavic with some Turkic impression. Balkan–Danubian culture