In early Christian tradition, saints' days began as a way to mark the anniversary of a martyr's death — his or her “birthday” as a saint. By the middle of the church's first millennium, there were so many martyrs (particularly due to the persecution of Diocletian) that it was hard to give them all their due. All Saints' Day was established as an opportunity to honor all the saints, known and unknown. Find contemporary songs of the day reminding us that we are part of one continuing, living communion of saints.