Well, I'll be Damned ...

There's an engraving of the prophet Muhammad in a frieze that decorates the Supreme Court Building in DC:

One chamber features a frieze decorated with a bas-relief sculpture by Adolph A. Weinman of eighteen influential law-givers. The south wall depicts Menes, Hammurabi, Moses, Solomon, Lycurgus, Solon, Draco, Confucius and Octavian, while the north wall depicts Napoleon Bonaparte, John Marshall, William Blackstone, Hugo Grotius, Louis IX, King John, Charlemagne, Justinian and, you guessed it, Mohammad.