Tomorrow, 13th December, is the Feast of Saint Lucy or Lucia Day, a celebration of her roles as both a Christian saint and a bearer of light in the dark Scandinavian winters. Candlelit processions are held at dawn or dusk, and traditionally Lucia wears ‘light in her hair’, which today means a crown of electric candles in a wreath on her head, although in the past there were real candles, as in this lovely watercolour (1908) by Carl Larsson.