Each month of the 2013 Quilt Calendar features a quilt print inspired by a traditional quilt pattern. July, seen here, is the only one that's derived from an actual quilt: the Stars and Stripes Quilt in the Smithsonian (see bottom image) made by Mary Rockhold Teter for her son George who served in the Civil War. The family donated the quilt to the Smithsonian in 1940. It's a beauty.
[Stars and Stripes Quilt image courtesy of Civil War Quilts, an excellent resource tip from a friend's mom who is an avid quilter. Thanks, SD!]