the marquette county courthouse is a beaux-arts and neoclassical structure, with a central three-story mass flanked by two-story wings. it is built almost entirely of local sandstone over a steel frame. a colossal portico covers the entrance, lined with granite doric columns from maine. a doric entablature with copper cornice rings the roofline. a copper dome surmounts the building, and sits above the second-floor courtroom.