Quilts ... circles ... curves

There's been some talk and photos about circles in quilts and curved piecing on this blog lately.  Of course we are not the only ones interested in piecing outside the square, curves featuring in quilts through the ages, and across the spectrum of utility to art quilts.  Here are some recent striking examples of quilters' fascination with curves ...

• Terry Aske's art quilt
• New York City Modern Quilters: Double Wedding Ring Challenge - winners

• Natalie Sabik's blog about her Modern Category winning quilt in the 2013 NYC Mod DWR challenge (above)

• 'Circle of squares' quilt block tutorial - a bit of a red herring, there are no curves here
• Empress of the Nile -  free pattern  from the American Quilters Society, featuring an interesting use of curves