[4] It replaced Mitchell's previous Marine Bank building and is believed to sit on the site of the home of Solomon Juneau, who founded Milwaukee in the 1830s.

[5] Mitchell hired prominent Milwaukee architect E. Townsend Mix to design his new building, and Mix came through with a 5-story rectangular block, in then-popular Second Empire style, with its first-story walls of gray Minnesota granite and upper walls of limestone, trimmed with multiple elaborate cornices and window hoods, with a complex mansard roof and an ornate central tower.

[1] The interior was said to be as elaborate as the exterior, with marble floors, wainscot, and elegant staircases, but much of that has disappeared with remodeling.

[1] In 1879 the Mackie Building was begun just next door, also built by Mitchell, designed by E. Townsend Mix and listed on the National Register of Historic Places.

Today the exterior of the Mitchell Building remains highly intact, and stands as an example of Second Empire style in Milwaukee.