The sixth annual DOORS OPEN MILWAUKEE event will open the doors to over 150 wonderful buildings free-of-charge to the public –buildings that hold hidden treasures and special stories – from churches to office buildings, theaters to work sites, museums to hotels, clubs to universities; all sites of historic, architectural, cultural, or commercial interest. The event has two major components: 1) design your own itinerary to visit over 150 buildings that will open their doors (often with guided tours, no tickets necessary); 2) join one or more in-depth tours that are ticketed (find details under the “Event Guide – In-Depth Tours” section of this website).