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Menu Passaic County Historical Society Welcome to the Passaic County Historical Society Welcome to the website of the Passaic County Historical Society. Formed in 1926 The Passaic County Historical Society was founded to cultivate interest among individuals in the community at large in the history of Passaic County. To that end the Society operates the Lambert Castle Museum maintains the Passaic County Historical Society Library curates a large and everexpanding collection of historic objects and materials and reaches out to the community through special events group tours and education programs. The Passaic County Historical Society also regularly hosts lectures concerts and specialized programs.