The Ten Commandments appear twice in the SC's courtroom itself. One is a bas relief of a bearded man in a robe holding two tablets with Hebrew writing on them. That one's obvious. The other is a carving of two tablets that are inscribed with the Roman numerals I through X. (The anti-God group claims this refers to the Bill of Rights rather than the Ten Commandments -- a tenuous argument since the Bill of Rights contains eleven articles -- but let that one go.)
Billybob