To celebrate the 10th anniversary of the Minneapolis Central Library building, hundreds of guests gathered in the airy atrium of the Hennepin County Library system’s downtown flagship. In addition to internationally acclaimed architect Cesar Pelli, who designed the building, Sen. Amy Klobuchar, D-Minn., and Hennepin County Commissioner Peter McLaughlin were in attendance. As the city lights streamed through the floor-to-ceiling windows, guests were serenaded by the Twin Cities Gay Men’s Chorus. See more photos at startribune.com/style.