baptistery(n = noun.artifact) baptismal font, baptistry, font - bowl for baptismal water;
is a kind of basin

   In early times, a separate building, usually polygonal, used for baptismal services. Small churches were often changed into baptisteries when larger churches were built near. [1913 Webster]

baptistery, n. (also baptistry) (pl. -ies)
1 a the part of a church used for baptism. b hist. a building next to a church, used for baptism.
2 (in a Baptist chapel) a sunken receptacle used for total immersion.

Etymology:
ME f. OF baptisterie f. eccl.L baptisterium f. eccl.Gk baptisterion bathing-place f. baptizo BAPTIZE

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.