In a lot of Italian churches these days they don’t allow actual candles or flame lamps for the devoted to leave for prayers. Instead, there are little electric candles and you put a coin in and they flicker for a few hours. Somehow it doesn’t quite do the trick, though it’s much better for the air quality inside the church and better, too, for the works of art around the altars. This may be a devotional scene you won’t be able to see a few years from now. By then, there will be an app for that.