3. The Exterior Stonework on City Hall is NOT Original
In the 1950s, it was decided that City Hall needed another restoration. Although the City Hall facade was originally of marble with a brownstone base, but over a century of industrial pollution had corroded the material. The light colored part of the facade is now limestone with granite. The architects of that restoration were Shrieve, Lamb and Harmon, the architects of the Empire State Building.
