Thaddeus Kosciuszko National Memorial, at 301 Pine Street in Philadelphia, Pennsylvania, preserves the home of Tadeusz (Thaddeus) Kościuszko. Instructed to find "a dwelling as small, as remote, and as cheap" as possible, Kosciuszko's secretary, Julian Ursyn Niemcewicz, chose Mrs. Ann Relf's boarding house in Society Hill (on the corner of 3rd and Pine Streets). The life and work of the Polish patriot and hero of the American Revolution are commemorated here.