In addition to its use in the Divine Office, the Te Deum is occasionally sung in thanksgiving to God for some special blessing (e.g. the election of a pope, the consecration of a bishop, the canonization of a saint, the profession of a religious, the publication of a treaty of peace, a royal coronation, etc.), and then usually after Mass or Divine Office, or as a separate religious ceremony. When sung thus immediately before or after Mass, the celebrant, who intones the hymn, may wear the vestments appropriate in colour to the day, unless these should happen to be black. Otherwise, while the rubrics prescribe no special colour, Violet is forbidden in processions of thanksgiving (pro gratiarum actione), green is inappropriate for such solemn occasions, red (though permissible) would not suggest itself, unless some such feast as Pentecost, for example, should call for it. White, therefore, or gold, which is considered its equivalent, is thus left as the most suitable colour. The choir and congregation sing the hymn standing, even when the Blessed Sacrament is exposed, but kneel during the verse "Te ergo quaesumus" At the end the versicles "Benedicamus Patrem" etc. are added, followed by the single prayer "Deus cujus misericordiae".