I just received an email from our guild webmistress with a link to the Victoria and Albert Museum (in London, England) quilting section. They have some excellent material and it is well worth taking a look:
http://www.vam.ac.uk/page/q/quilts-patchwork-and-quilting/
And don’t forget the excellent resources at the International Quilt Study Center & Museum at Lincoln, Nebraska:
And the National Quilt Museum in Paducah, Kentucky
All these places would be wonderful to visit. Fortunately they have some excellent resources online, so we can benefit from their work even if we can’t go visit.