sacristy(n = noun.artifact) vestry - a room in a church where sacred vessels and vestments are kept or meetings are held;
is a kind of room
is a part of church, church building

   An apartment in a church where the sacred utensils, vestments, etc., are kept; a vestry. [1913 Webster]

sacristy, n. (pl. -ies) a room in a church, where the vestments, sacred vessels, etc., are kept and the celebrant can prepare for a service.

Etymology:
F sacristie or It. sacrestia or med.L sacristia (as SACRED)

N  temple, place of worship, house of God, house of prayer, temple, cathedral, minster, church, kirk, chapel, meetinghouse, bethel, tabernacle, conventicle, basilica, fane, holy place, chantry, oratory, synagogue, mosque, marabout, pantheon, pagoda, joss house, dogobah, tope, kiosk, kiack, masjid, parsonage, rectory, vicarage, manse, deanery, glebe, Vatican, bishop's palace, Lambeth, altar, shrine, sanctuary, Holy of Holies, sanctum sanctorum, sacristy, sacrarium, communion table, holy table, Lord's table, table of the Lord, pyx, baptistery, font, piscina, stoup, aumbry, sedile, reredos, rood loft, rood screen, chancel, quire, choir, nave, aisle, transept, vestry, crypt, golgotha, calvary, Easter sepulcher, stall, pew, pulpit, ambo, lectern, reading desk, confessional, prothesis, credence, baldachin, baldacchino, apse, belfry, chapter house, presbytery, anxious-bench, anxious-seat, diaconicum, jube, mourner's bench, mourner's seat, cloisters, churchyard, monastery, priory, abbey, friary, convent, nunnery, cloister, claustral, cloistered, monastic, monasterial, conventual, ne vile fano, there's nothing ill can dwell in such a temple.