Smithsonian Institute, Washington, D.C.

National Museum, Washington, D.C.

The Smithsonian Institution.

The Smithsonian Institution.

The Smithsonian Institution.

Smithsonian Institute, Washington, D.C.

Smithsonian Institute, Washington.

Exterior, Smithsonian Institution, Washington, D.C.

National Museum.

Smithsonian Institute.

Smithsonian Institute.

Smithsonian Institute.

Smithsonian Institute, Washington.

Smithsonian Institute.

Smithsonian Institute.

View of the Smithsonian Institute. Washington, D.C.

Post Office.

U.S. Post Office Department, Washington, D.C.

The U.S. Post Office - Washington.

General Post Office, Washington, D.C.

U.S. Post Office, Washington, D.C..

U.S. Post Office, Washington, D.C.

Post Office.

U.S. Post Office.

Post Office Department.

U.S. General Post Office, Washington, D.C., Palatial Style, modified Corinthian Order.

U.S. Post Office, Washington, D.C.

U.S Post Office, Washington, D.C.

U.S. Post Office, Washington, D.C.

U.S. Post Office.