A sacristy is a room for keeping vestments (such as the cassock and chasuble) and other church furnishings, sacred vessels and church treasures. Vestments are liturgical garments and articles associated primarily with the Christian religions, especially the Catholic, Eastern Orthodox and Anglican Churches. ... An Anglican priest wearing a single-breasted cassock. ... A fiddleback chasuble from the church of Saint Gertrude in Maarheeze in the Netherlands The chasuble is the outermost liturgical vestment worn by clergy for the celebration of the Eucharist among Western-tradition Christian churches that use full vestments, primarily the Roman Catholic Church and high church congregations in the... Vessel can refer to any of the following: Objects Vessel (French vaissel, from a rare Latin vascellum, diminuitive of vas, vase, or urn), a word of somewhat wide application for many objects, the meaning common to them being capacity to hold or contain something. ...

The sacristy is usually located inside the church, but it could be an annex or separate building (as in some monasteries). In most older churches the sacristy is near one of the side altars or more usually behind or to the side of the main altar. In newer churches the sacristy is often in another location, such as near the entrances to the church.

Some churches will have more than one sacristy, each of which will have a specific function. Often additional sacristries are used for maintaining the church and its items - such as candles and other materials.

A person in charge of the sacristy is called a sacristan.

The sacristy is also where the priest and attendants dress and prepare before the service. They will return there at the end of the service to remove the special robes and put away any of the vessels used in the service. Roman Catholic priests in traditional clerical clothing. ... In Christianity, a church service is a term used to describe a formalized period of worship, often but not exclusively occurring on Sunday, or Saturday in the case of a church practicing Sabbatarianism. ...

Sacristies usually contain a special wash basin in which the outlet flows directly into the ground. This wash basin is used to wash remnants of Holy Communion off the ciborium, and sometimes remnants of wine from the chalice and cruets. The cruets, chalice, ciborium, paten and altar linens; and sometimes the Eucharist itself is kept inside the sacristy. Sacristies are usually off limits to the general public. The Eucharist is either the Christian sacrament of consecrated bread and wine or the ritual surrounding it. ... The Eucharist or Communion or The Lords Supper, is the rite that Christians perform in fulfillment of Jesus instruction, recorded in the New Testament[1], to do in memory of him what he did at his Last Supper. ...

The word "sacristy" derives from the Latin "sacristia".