ult ural ▁region ▁of ▁K oc iew ie . ▁ ▁The ▁town ▁is ▁the ▁location ▁for ▁the ▁annual ▁English ▁Language ▁Camp ▁arranged ▁by ▁the ▁American - Pol ish ▁Part ners hip ▁for ▁T cz ew . ▁ ▁Ge ographical ▁location ▁ ▁T cz ew ▁is ▁located ▁on ▁the ▁west ▁bank ▁of ▁river ▁V ist ula , ▁approximately ▁ ▁south ▁of ▁G da ń sk ▁Bay ▁at ▁the ▁Balt ic ▁Sea ▁and ▁ ▁south - east ▁of ▁G da ń sk . ▁ ▁History ▁ ▁Middle ▁A ges ▁ ▁T cz ew ▁( T rs ow , ▁D ers owe , ▁‘ we aver ' s ▁town ’ ) ▁was ▁first ▁mentioned ▁as ▁Tr s ow ▁in ▁a ▁document ▁by ▁P omer an ian ▁Duke ▁Gr zym is ław ▁best ow ing ▁the ▁land ▁to ▁the ▁Kn ights ▁H osp it aller ▁in ▁ 1 1 9 8 . ▁Ar ound ▁ 1 2 0 0 ▁S amb or ▁I , ▁Duke ▁of ▁P omer ania , ▁built ▁a ▁for tr ess ▁here . ▁In ▁some ▁documents , ▁the ▁name ▁D ers zew o ▁appears , ▁which ▁st ems ▁from ▁the ▁name ▁of ▁a ▁fe ud al ▁lord , ▁D ers ław . ▁It ▁is ▁unknown ▁whether ▁Tr s ow ▁and ▁D ers zew o ▁referred ▁to ▁the ▁same ▁or ▁two ▁neighbor ing ▁settlement s . ▁In ▁order ▁to ▁obtain ▁better ▁control ▁of ▁traffic ▁on ▁the ▁V ist ula , ▁P omer an ian ▁Duke ▁S amb or ▁II ▁moved ▁his ▁residence ▁form ▁Lub