Period

5 results for: observation

  • Page
  • of
  • 1
Please sign in for more results
Charles Martel.
HAC08108_2007_P08000001

Charles Martel.

Adolf Hitler.
HAC07251_2004_P2000096

Adolf Hitler.

View of the great equatorial telescope of the Paris Observatory (Dome of the West Tower). 1864.
HAC07251_2004_P1900241

View of the great equatorial telescope of the Pari...

Observation balloon during World War I
HAC00096_P2000035

Observation balloon during World War I

Observation post ok French artillery
HAC00096_P2000052

Observation post ok French artillery