of Baptistry
Source: Webster's dictionaryBaptisteries commonly adopted centralised plan forms derived from funerary chapels; and are invariably separate from the congregational basilica. Source: Internet
Cathedral Basilica of Saint Louis Cathedral Basilica of Saints Peter and Paul in Philadelphia Baptisteries The baptistery in the Dura church was about 1m square and 1m deep; baptismal candidates could stand in it, but could not be immersed. Source: Internet
Baptisteries often occur in Italy as a free standing structure, associated with a cathedral. Source: Internet