There were once over a dozen courtrooms in the Old Courthouse, and there are just two left that have been carefully restored to their original appearance. This is one of them; you can see below how the floor has been worn smooth from all of the shoes that have walked over them.
The other courtroom on the other side of the rotunda is also elliptical in shape, and has a a more classical paint scheme with subdued white and greens.
It seems like no detail was left to chance, as this elegant staircase from one of the rotunda galleries illustrates.
As was typical in Greek Revival architecture, the doorways were tapered to give the sense of greater height.