Christianity

Baptism, as a form of ritual purification, occurs in several religions related to Judaism, and most prominently in Christianity; Christianity also has other forms of ritual purification. In older churches, and modern Roman Catholic churches, there are a number lavers around the building for the laity to use as ritual symbolism of cleansing themselves, usually by dipping the fingertips in the holy water, and then making the sign of the cross. In traditional liturgical churches a laver, often embedded in the wall, exists for the priest and deacon to wash their hands before celebrating the Eucharist.

Many ancient churches were built with a large fountain in the courtyard. It was the tradition for Christians to wash before entering the church for worship. This usage is also legislated in the Rule of St. Benedict, as a result of which, many medieval monasteries were built with communal lavers for the monks or nuns to wash up before the Daily Office.

Traditionally, Christianity adhered to the biblical regulation requiring the purification of women after childbirth; this practice, was adapted into a special ritual known as the churching of women, for which there exists liturgy in the Church of England's Book of Common Prayer, but its use is now rare in Western Christianity. The churching of women is still performed in a number of Eastern Orthodox, Oriental Orthodox and Eastern Catholic churches.

Roman Catholics, Eastern Orthodox and High church Anglicans are also traditionally required to regularly attend confession, as a form of ritual purification from sin, especially as preparation before receiving the Eucharist. However, this is only required once a year or if a mortal sin has been committed.

In Reformed Christianity, ritual purity is achieved though the Confession of Sins, and Assurance of Forgivess, and Santification. Through the power of the Holy Spirit, believers offer their whole being and labor as a 'living sacrifice'; and cleanliness becomes a way of life (See Romans 12:1, and John 13:5-10 (the Washing of the Feet)).