A number of countries, including the United States, have issued postage stamps honoring Enrico Fermi. You can view these via an image search on Google.
Nuclear Energy, a 12-foot tall bronze sculpture by the British abstract artist Henry Moore (1898-1986), was unveiled at 3:36 p.m. on December 2, 1967, precisely 25 years after scientists at the University of Chicago achieved the first controlled self-sustaining nuclear chain reaction. The sculpture stands on the site of the University's old Stagg Field West Stands, where the experiment took place in a former squash court. The team of scientists was led by Enrico Fermi.
The abstract sculpture is suggestive of the shape of a human skull or an atomic mushroom cloud. Henry Moore himself hoped those viewing it would "go around it, looking out through the open spaces, and that they may have a feeling of being in a cathedral."
Photos of the creation of Nuclear Energy (click to see larger images):
Assembly Polishing Installation
Dedication View at site
To Fermi - with Love. Argonne, Ill. : Argonne National Laboratory, [1974?]
(2 sound discs : analog, 33 1/3 rpm, mono. ; 12 in.)
Side one (11.4 MB, .mp3)
Atomic year 25 : the story of CP-1 : a silver anniversary documentary on the first controlled nuclear chain reaction. Argonne, Ill. : Argonne National Laboratory, [1967?] (1 sound disc : analog, 33 1/3 rpm ; 12 in.)
The Nuclear Chain Reaction: Forty Years Later / edited by Robert G. Sachs. Chicago : University of Chicago Press, 1984
The Chain Reaction: December 2, 1942 and After
An Exhibition in the Department of Special Collections,University of Chicago Library
October 1, 1992 - December 4, 1992
Enrico Fermi and his legacy in nuclear physics: a website contest for U.S. and Italian students (commemorating the 100th anniversary of Fermi's birth)
Mertens, Richard, "Beyond the Bomb," University of Chicago Magazine, Volume 94, Number 2 (covers symposium held on the occasion of the 100th anniversary of Fermi's birth)
"Dawn of the Nuclear Age" CP-1 70th Anniversary Symposium (Argonne National Laboratory)