Of course they are. But the Commandments themselves aren't chiseled onto the building, which pabianice said they are.
You're proving my point. His was that the Commandments were there in a religious context, mine that they were in an historical context. Moses is right there with Confucious, Hammurabi and Napoleon. It's no more an endorsement of Napoleon than it is the Ten Commandments.
Located on the entry doors of the Supreme Court there are two tablets with the roman numerals 1 through 10 engraved into the wood - what do you think those represent?