 Calvin provided many of the foundational documents for reformed churches , including documents on the catechism , the liturgy , and church governance . He also produced several confessions of faith in order to unite the churches . In 1559 , he drafted the French confession of faith , the Gallic Confession , and the synod in Paris accepted it with few changes . The Belgic Confession of 1561 , a Dutch confession of faith , was partly based on the Gallic Confession . 
