Getting these corner triangles exactly right was a bit taxing to my right-brained self, especially with my block on point and this piece having to measure precisely 15" square, finished.
However, somehow this came out o.k.!
The inner stitching line is 1/4" out from where my finished edge will be.
That blue cotton lace was the last of about 25 that were auditioned....but when I held it in place, I knew that was the one.
Now, to fill in those corners...something viney, I think.......