When looking up into the dome, we can see some of the windows and skylights the architect, John E. Tourtellotte, designed into the building to make the best use of natural light. For him, light was a metaphor for an enlightened and moral state government. Remember, this was 1905, after all, when people seemed to actually think like this. Mr Tourtellotte wrote, "The great white light of conscience must be allowed to shine and by its interior illumination make clear the path of duty."
The oculus, in the center of the dome, has 13 large stars representing the 13 original colonies. The 43 smaller stars represent Idaho's admission, in 1890, as the 43rd state in the Union.
Idaho State Capitol