When the villagers took a vow in 1633, they pledged to be the ones to cover the costs of the play. They have followed this vow through the centuries. While there is a huge cost involved in preparing for the play season, including costuming, set-building, rehearsal times, the costs are recouped with the huge influx of tourists and audience members. It is a source of great revenue for the town of Oberammergau.