I think this one is an older one than many.

Did you get the whole story about the great effort to protect the Rose windows of Chartres during the World Wars?

Teams of Indian and Jamaican students from the English “public school” Harrows came over to France to help save the windows. They stored them in a barn, under dried cornstalks.

Yes, that’s right — Harrows colored classes used arroz-colored grasses to cover rose colored glasses.