1 Wall Street (left): hot-cha Art Deco skyscraper. Ralph Walker, 1921. Now home to The Bank of New York.
Empire Building (right): Francis Kimball, 1898. Was the home to U.S. Steel for three-quarters of a century. Now (of course) it's apartments.
I say a little more about the Empire Building on my landmarks blog.
National Register Numbers
Empire Building: 83004643 (New York County, New York)
Wall Street Historic District: 07000063 (New York County, New York)