The U.S. Postal Service is turning 250. Saturday’s anniversary comes as the agency faces financial challenges.

As the USPS celebrates its 250th anniversary, AD examines the surprisingly fascinating history of the agency’s buildings ...

Receiving surprise letters, greeting cards, packages and gifts in the mail—and not just advertisements and bills—remains one ...

In the 1970s, it was transformed into an independent agency, the United States Postal Service, and once again required to be self-sufficient — but also to provide nationwide service at uniform ...