People Poland Jan Ciechanowiecki peoplepill id: jan-ciechanowiecki-5JC 9 views today 9 views this weekJan CiechanowieckiBiographyListsAlso ViewedListsJan Ciechanowiecki is in following listsBy work and/or countryNotable Polish peopleGender:Male, Born in:Years 1750 to 1799From our partnersSponsoredJan Ciechanowiecki