Cunard Building
... that the Great Hall of New York City's Cunard Building was formerly used as a post office?
... that the Great Hall <i id="mwAdA">(pictured)</i> of New York City's <b id="mwAdE"><a href="./Cunard_Building_(New_York_City)" id="mwAdI" rel="mw:WikiLink" title="Cunard Building (New York City)">Cunard Building</a></b> was formerly used as a post office?