We found a bunch of great postcards in the Boston Public Library’s Flickr photostream and here is one of our favorites.

Daybreak over Washington, D.C.
Source: Flick user Boston Public Library
Here is another great one, showing the Washington Monument.

The Washington Monument at night
Source: Flickr user Boston Public Library
And another great one of the Capitol Building.

The Capitol Building at night
Source: Flickr user Boston Public Library