Obviously, our national library is not at Judiciary Square, but before we committed to building the Library of Congress on Capitol Hill, there were some other proposals evaluated. Below are two drawings of the proposed library to be built at Judiciary Square. These drawings were from between 1875 and 1879.
In the end, the design that got built on Capitol Hill was the one submitted by John Smithmeyer and Paul Pelz, who won the 1873 competition. What happened to them after they won is a story worth knowing.