www.youtube.com/watch?v=lljm1rlTeeA&hd=1 www.dailymotion.com/video/xfbw3z_milwaukee-traffic_travel right side : Northwestern Mutual Building ( grey ) 720 E. Wisconsin Ave. Built: 1914 One of America's largest insurance companies, Northwestern Mutual has occupied several downtown locations over its lifetime. Prior to this site, it was at 611 N. Broadway. Thousands of tons of steel and granite are supported by 6000 wooden