Ferdinand C. Hartwig HouseThe Ferdinand C. Hartwig House is a historic house located at 908 Country Lane in Watertown, Wisconsin. It was added to the National Register of Historic Places on June 17, 1982.HistoryThe house was built by Prussian immigrant Ferdinand Hartwig. It was later bought by Kirby and Judith Brant. Current owners Jerold & Jill LaPinske 1998 to present.