In June 2008, Mildred Bosilevac presented the Heinz History Center with a special quilt to commemorate significant moments in Pittsburgh's storied 250-year history. The five-foot commemorative quilt, entitled "250th Anniversary of Pittsburgh and the Southwestern Region of Pennsylvania 1758 - 2008," was created by 23 women representing the many quilters from the Western Region and produced as part of the 2008 Quilter's Weekend at the History Center. It features 25 squares, each honoring landmark organizations, events, and Pittsburgh firsts. Karen Montgomery, of the Quilt Company, contributed much of the material used, and Barbara Thompson completed the quilting, using a long-arm quilting machine.