Frank Lloyd Wright Foundation Oak Park Skylight Stained Glass by YTC Summit. Oak Park/Skylight Stained Glass, Certified by the Frank Lloyd Wright Foundation. Good condition with no noticeable scratches or stains. Please check the photos for your own impression. 39.0 x 17.4 cm / 15.4 x 6.9. Package size 45.0 x 31.0 x 4.8 cm / 17.7 x 12.2 x 1.9. International Buyers – Please Note.