Oregon Capitol
The lower stairway, below the spiral steps, leads through the tower to the fourth floor. This journey gives you a good look at the interior blue tinted windows of the dome, left, and the exterior tower windows, right. In the center photo you can see how the exterior windows allow light from the outside to enter and shine through the opposite dome windows. When you look up at the dome windows from the rotunda, You are seeing the outside light penetrating the blue tinted glass.
capitols main page