Warming big old churches and cathedrals are a costly affair in the Netherlands. And when it’s too cold, sometimes they even cancel services. Sustainable consumer platform Nudge in Haarlem held a contest called ‘Holy Warming’ to collect ideas about how to warm up Sint Bavo Cathedral in a sustainable way . The winner was ‘Church on a cloud’: heat the Cathedral by putting a data centre in the cellar. The Cathedral keeps the racks cool and the computers keeps the flock warm. Amen!

(Link: bright.nl, Photo of the Saint Gertrude cathedral in Utrecht by Wikimedia user pepijntje, some rights reserved)