For those who are interested, here's a discussion thread for Amish and Mennonite quilts. Traditional Amish and Mennonite quilts are two very different things. I have one Amish quilt on my site:
This one, a traditional Lancaster county pattern, is called "Sunshine & Shadow". Traditional Amish quilts employed solid colors, often in a subdued pallette. Antique Amish quilts were often wool, later they used more cotton and during the WWII years they began using rayon crepes. The Amish in America have not been quilting for a long time; it is VERY RARE to find a 19th century Amish quilt.
On the other hand, Mennonites did use the bright calicos so beloved by the other Pennsylvania Germans as well as solids, and there are many Mennonite quilts from pre-1900. One of the common attributes of Pennsylvania Mennonite quilts is the use of a "bars" or symmetrically striped backing, though this was by no means restricted to the Mennonites. Here are pictures of the front and back of a Berks Co. Mennonite crib quilt I sold: