vent h ▁centuries , ▁when ▁it ▁was ▁instead ▁occupied ▁by ▁numerous ▁small ▁and ▁primitive ▁gr uben haus ▁dwell ings . ▁According ▁to ▁Hen ning ; ▁ ▁“ It ▁was ▁not ▁the ▁case ▁that ▁a ▁pre domin antly ▁agricult ural ▁style ▁of ▁living ▁opened ▁the ▁way ▁to ▁a ▁step wise ▁growth ▁in ▁craft ▁activities , ▁but ▁rather ▁a ▁situation ▁of ▁fully ▁developed ▁and ▁highly ▁special ized ▁art isan ▁production ▁was ▁followed ▁later ▁by ▁a ▁process ▁of ▁broad ▁rural ization ”. ▁ ▁Sch olar ly ▁disput es ▁Some ▁sch ol ars , ▁such ▁as ▁Georg iev ▁and ▁Kir il ov , ▁have ▁proposed ▁that ▁Pl iska ▁was ▁not ▁in ▁fact ▁the ▁capital ▁of ▁Bulg aria ▁during ▁this ▁period ▁at ▁all . ▁Georg iev ▁suggests ▁that ▁Pl iska ▁was ▁only ▁a ▁season al ▁residence ▁with ▁small ▁tim ber ▁buildings ▁at ▁least ▁until ▁the ▁middle ▁of ▁the ▁e ighth ▁century . ▁Kir il ov ▁offers ▁the ▁explanation ▁that ▁like ▁the ▁Ott onian ▁k ings , ▁the ▁Bulgar ▁r ul ers ▁were ▁it iner ant , ▁and ▁travel led ▁between ▁multiple ▁different ▁resid ences . ▁Additionally , ▁prior ▁to ▁some ▁more ▁recent ▁finds ▁in ▁the ▁As ar - d ere ▁area ▁of ▁the ▁arch ae ological ▁site , ▁it ▁was ▁believed ▁that ▁the ▁craft ▁activities ▁att ested ▁by ▁Mil č ev ▁showed ▁that ▁site ▁did ▁not ▁become ▁a ▁true ▁large ▁town ▁until ▁the ▁later ▁nin th ▁or ▁early ▁t enth ▁century , ▁however ▁Hen ning ▁shows ▁that ▁this ▁may ▁have ▁occurred ▁in ▁reverse ▁order . ▁Cer am ic