Millennium Building
The Millennium Building is a building located in downtown Missoula, Montana, United States. At 9 floors, it is the tallest building in downtown Missoula and rises to 128 feet. History. The Millennium Building was opened in 1998. Tenants. One of the Millennium Building's main tenants is Dorsey & Whitney, who occupies the 6th floor of the building. Dorsey & Whitney is a national law firm based out of Minneapolis which maintains a small but successful satellite office in Montana. Grundig Satellit 800, a live radio station, is also located in the Millennium Building.