Kamandi
Super Freak
Lol. The Founders may have had Christian inclinations, but it's not where they got their political ideas. No religion has a right or reason to be represented on U.S. government property.
Public money is spent every day as part art grants issued from federal money. Much of this money is also used to make art that comments on religion in controversial ways. This is protected as free speech repeatedly in court. Often times the art is displayed on public grounds. So let's be consistent.
If the artwork is a landmark or historically significant it should be protected.
This is what happens when easily offended people decide to start destroying landmarks of religions they don't like: