Unlike level two, the third level would house the upstairs, if you will, of the important 2nd level spaces occupied by the Minnesota Supreme Court, the House of Representatives, and the Senate. The Supreme Court does not have an upper level and instead one can find offices of state officials in these areas. The Senate has a gallery but it is only open during tours. There are nice bird's-eye views of the second to third level staircases and murals near the ceiling in the center of every corridor.
Here are a few other close-ups of the ceiling murals. The last two feature corn and can be found outside in the hallways. There's quite a bit of corn throughout the building. Do you know many ears of corn in total can be found in the Capitol?