HistoricLost place
Old Naval Observatory
1843 – 1893
The Old Naval Observatory is a historic site at 23rd and E Street in Northwest, Washington, D.C. It is where the United States Naval Observatory was located from 1844 to 1893, when it moved to its present grounds. The original observatory building, built 1839–40, still stands, and is a designated National Historic Landmark as of 1965. The Washington meridian of 1850 passes through the Observatory.
Source: Wikipedia / Wikidata
Nearby