This magnificent 36,000 sqft home was built in 1891 by James J Hill. Hill made his fortune in the rail road, and purchased the lots on Summit Avenue for it's commanding view of St. Paul. He built the house using state of the art technology back in those days, incorporating electric lighting and a unique ventilation / heating system. This Richardsonian Romanesque style home is on the National Register of Historic Places and is a museum worth visiting.