In the Catholic Church, a canonical visitation is the act of an ecclesiastical superior who in the discharge of his office visits persons or places with a view to maintaining faith and discipline and of correcting abuses. A person delegated to carry out such a visitation is called a visitor. When, in exceptional circumstances, the Holy See delegates an apostolic visitor (or visitors) "to evaluate an ecclesiastical institute such as a seminary, diocese, or religious institute [...] to assist the institute in question to improve the way in which it carries out its function in the life of the Church," this is known as an apostolic visitation.