It would be even more accurate to rely upon the barony/church/town unit as representative of populations of cultures, religions, and of the geographic terrains, rather than just whole counties accounting for all excepting possibly just terrains at the same time. For example, the Dalmatia region of Croatia could have the Slavic Croatian culture for most regions by a certain point (1066 AD?), and some Dalmatian cultural holdouts mostly focused around the city holdings or baronies along the coast and the islands. This dynamic would have an important impact on Venetian history, as well, all the way through its entire lifespan as a sovereign, Most Serene Republic.