Quatrefoil window Chiswick, England. Look at the gorgeous colors in the brick...the orange and blue together.
Ironies also makes a gorgeous quatrefoil style mirror called the 'Araby' mirror.
Walker Zanger makes a beautiful collection with quite a few quatrefoil shapes called 'Avignon' - it is worth looking at.
Visit my online store, Quatrefoil Design: www.quatrefoildesign.bigcartel.com
To see design, architecture, art, and decorative books that I recommend, please visit the Things That Inspire Amazon store.