The emphasis in worship in most Reformed churches has been on scripture and preaching. Much of the medieval mass was seen as superfluous to true worship and church buildings were stripped of their statuary and other forms of art.
Musical instruments were not allowed and only the Psalms were sung in metrical form. Although it was recommended that communion should be celebrated frequently, the Roman belief in transubstantiation and the sacrificial nature of the mass were negated. Although the extremes of the early Reformation were modified as time went on, Reformed worship remained simple and focused on scripture.