Frank Lloyd Wright Foundation July Fourth Flags Stained Glass Panel Glassmasters. Frank Lloyd Wright July 4th Flags Stained Glass Panel. It has a metal tag at the bottom that says A Frank Lloyd Wright Collection Product Authorized by the Frank Lloyd Wright Foundation. Generally good condition with no noticeable scratches or stains. However consider that this had been stored in a private residence. Please check the photos for your own impression. 25.3 x 22.5 cm / 10.0 x 8.9. International Buyers – Please Note.