Puzzle Purse

This reminds me of one of these, hence the title.  I hadn't planned for it to be so symmetrical, and had no idea the rectangles would form a square.  The rectangles are concrete blocks, as in the recent 'Sparkling like Diamonds' photos.  The original blocks are gone.  And so is the pile of brushwood from another recent photo; when I passed today it was a pile of smoking ash.