 During his time in Strasbourg , Calvin was not attached to one particular church , but held his office successively in the Saint @-@ Nicolas Church , the Sainte @-@ Madeleine Church and the former Dominican Church , renamed the Temple Neuf . ( All of these churches still exist , but none are in the architectural state of Calvin 's days . ) Calvin ministered to 400 – 500 members in his church . He preached or lectured every day , with two sermons on Sunday . Communion was celebrated monthly and congregational singing of the psalms was encouraged . He also worked on the second edition of the Institutes . Calvin was dissatisfied with its original structure as a catechism , a primer for young Christians . 
