[Tennessee_Bob]

Went to Google, did a search for "Obsidian Order" "Black Shirts", and came up with the following, single hit -

Imperial State Power in America, by Al Martin
... romanesque column in the background. This is also the same symbol that Mussolini
adopted for the Obsidian Order of the Black Shirts. In the Third Reich, you ...
www.almartinraw.com/column53.html - 27k - 25 Mar 2002 - Cached

You can also find similar artwork all over the US, here's some from Hoover Dam -