Pittsburgh Mayor Joseph G. Armstrong in the spring of 1916 placed copies of the city’s newspapers, a Bible and Pittsburgh and American flags to into a copper box.
He added a copy of the blueprints for the City-County Building and a history of Grant’s Hill, the mound that had once sat where the new nine-story City-County Building was then being constructed on Grant Street in Downtown Pittsburgh.
Newspaper reports from the time show his son, Joseph G. Armstrong Jr., helped him seal the box…