The top of our front door has a window of combined frosted glass and triangular-cut glass pieces, the latter of which which make for unexpectedly nice prisms. When the sun is at the right point in the sky or reflecting off a car window, we sometimes get rainbows thrown onto our walls, but I think this was the first time I’d seen any–let alone four at once–on our floor.
My wife was taken with the fact that it’s of such high quality a rainbow that, especially in the top right one, you can see the full spectrum from red to violet.