Baptism is a Christian rite of admission into the church. In Roman Catholicism and Orthodoxy it is a sacrament of the church, and in virtually all denominations it is performed by pouring water onto the person or immersing them. This is also called "christening" because a person's baptism symbolizes the baptism of Jesus. Most Christian denominations practice infant baptism, where an infant born into a Christian family is typically baptised several days after he is born. Some denominations only baptise those who consciously profess faith in Christ, known as believer baptism. Even in denominations where infant baptism is most common, a person may get baptised at any age.