9 September 1974
| 301 Liberty Street, Conneaut, Ohio|David Cummins Octagon House Wikipedia
The David Cummins Octagon House is an historic octagon house located at 301 Liberty Street in Conneaut, Ohio. Built in 1860, it is named for David Cummins, who founded the Cummins Canning Company in Conneaut. Because the house had an underground tunnel running from it to the nearby Conneaut Creek, it has been said that the house was a station on the Underground Railroad, but this has been questioned and it has been suggested that the tunnel belonged instead to a previous house located on the property.
On September 9, 1974, it was added to the National Register of Historic Places.