It’s not that unusual to find some of the world’s greatest art in churches but here’s some unusual ways that art is being used. Swiss artist Gerry Hofstetter will light the Washington National Cathedral in psychedelic coloration as part of an exhibit May 9 – 11 called Lighting to Unite: Lighting the Nation, Uniting the World. It’s free and public picnics are encouraged. It will be lit each of the three nights from sunset to midnight. Lighting as art creates visual and memorable impact as mentioned in previous posts. Another use of art in churches can be seen in the banners that we might normally take for granted but they,…