the country seats, the architectural style. The territory between Königsberg, the lower reaches of Pregolya and Łyna river was architecturally mixed – of German-Lithuanian pattern. The latter area was inhabited by mostly Prussians and Lithuanians, later – Germans and Lithuanians. The Lithuanian Province together with the latter area and Sambia peninsula presents the broader perception of Lithuania Minor (about 18 000 km²). The area of the everyday vocabulary of Lithuanian country The area of churches where Lithuanian sermons were used in 1719. F. Tetzner on the ground of the list of villages where Lithuanian sermons were used in 1719 defined the southern limit of Lithuanian parishes. F. Tetzner wrote in the beginning of the 20th century: 200 years ago the Lithuanian language area embraced, not mentioning the ten present districts of Prussia, also these: Koenigsberg, Žuvininkai, Vėluva, Girdava, Darkiemis and Gumbinė districts. Lithuanian sermons were finished in the last century in Muldžiai, Girdava district, also coastal villages around Žuvininkai and in the Koenigsberg district. The limits of the latter Lithuanian areas were more southwest. Various other fragmentary demographic sources (the first general census was made in 1816) and the lists of colonists of the 18th century showed the area of Lithuanian majority and the areas of considerable percentage of Lithuanians to the first half of the 18th century. It was more southwest from the once existed administrative Lithuanian Province. The southern limit of Lithuania Minor went by Šventapilis (Mamonovo), Prūsų Ylava (Preußisch Eylau, Bagrationovsk), Bartenstein (Bartoszyce), Barčiai (Dubrovka), Lapgarbis (Cholmogorovka), Mėrūniškai (Meruniszki), Dubeninkai (Dubeninki). The southern limit of the most compact Lithuanian area went by Žuvininkai, Königsberg, Frydland, Engelschtein (Węgielsztyn), Nordenburg (Krylovo), Węgorzewo, Gołdap, Gurniai, Dubeninkai. Ethnic composition The economic and especially demographic statistics had been fragmentary previous to the first general census of 1816. The accounting after the native tongue had begun since the census of 1825–1836. Thus, the situation of ethnic composition previous to the century is known from the various separate sources: various records and inventories, descriptions and memoirs of contemporaries, language of the sermons used in the churches, registers of births and deaths; various state published documents: statutes, acts, decrees, prescriptions, declarations etc. The lists of peasants‘ pays for plots and grinding of flour was also demographic source. Lithuanian and German proportion of Piliakalnis (Dobrovolsk) in the middle of the 18th century was determined by O. Natau on the ground of these lists. The toponymy of