The Great Equatorial Building/26-Inch Telescope House.

ID: 5512 ~ Source: National Register Nomination Form. ~ Creator: Haley Schriber, John Milner Associates Preservation, Arlington, Virginia and John Twomey, U.S. Secret Service, Washington, D.C. ~ Date: July 2020.
This file appears in: United States Naval Observatory (USNO) Historic District
The Great Equatorial Building/26-Inch Telescope House.

Looking northwest towards south elevation of Building 2 (from nomination form).

This file appears in: United States Naval Observatory (USNO) Historic District

The United States Naval Observatory (USNO) Historic District is encompassed by Observatory Circle and Massachusetts Avenue NW, and corresponds to a period of significance dating from 1887 to 1973. The hilltop campus, which includes significant…