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In page Huldrych Zwingli:

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Although the council had hesitated in abolishing the Mass, the decrease in the exercise of traditional piety allowed pastors to be unofficially released from the requirement of celebrating Mass. As individual pastors altered their practices as each saw fit, Zwingli was prompted to address this disorganised situation by designing a communion liturgy in the German language. This was published in Aktion oder Brauch des Nachtmahls (Act or Custom of the Supper). Shortly before Easter, Zwingli and his closest associates requested the council to cancel the Mass and to introduce the new public order of worship.[citation needed]