Grain Exchange Room at the Mackie Building

The Grain Exchange Room located in the Mackie Building in downtown Milwaukee, showcases beautiful “Simple Italian” architecture, soaring ceilings, hand painted frescoes, gold leaf and over 10,000 sq. feet of usable event space in an outstanding and historical location.

The three story “cathedral of commerce” was closely linked with the early commercial history of Milwaukee, when for a brief time, the city was the world’s largest primary wheat market for trading, exporting and inspecting grain.  Milwaukee’s lake port was near vast acres of wheat so the Milwaukee Grain Exchange made its home in the Chamber of Commerce building, inventing and utilizing the very first octagonal trading pit.

Bartolotta Catering & Events is the exclusive caterer, and provides beverage service for the venue:  414-727-6980 or

The Mackie Building utilized the City of Milwaukee’s Property Assessed Clean Energy (PACE) financing program to help fund energy- and water-saving components, such as HVAC improvements, elevator replacement, hot water equipment, and low-flow plumbing, during recent renovations. The building is also a participant in the Better Buildings Challenge and continues to work toward energy reduction.

Building Info :

225 E. Michigan Street
10 am to 5 pm
10 a.m. - 5 p.m.
Fully accessible