It is an evergreen wreath with four candles, sometimes with a fifth, white candle in the center. Beginning with the First Sunday of Advent, the lighting of a candle can be accompanied by a Bible reading, devotional time and prayers. An additional candle is lit on each subsequent Sunday until, by the last Sunday of Advent, all four candles are lit. Some Advent wreaths include a fifth, Christ candle which is lit at Christmas Eve or Christmas Day. The custom originated in family settings but has also become widespread in public worship.