NEUTRAL
Wilkes Observatory
DuPont, United States
Site of Wilkes Observatory Built in 1841 In this building work of United States exploring expedition was conducted Marker erected by E. I. DuPont de Nemours & Co.
DuPont, United States
Site of Wilkes Observatory Built in 1841 In this building work of United States exploring expedition was conducted Marker erected by E. I. DuPont de Nemours & Co.