A structure or room that precedes or comes before the main church building; a vestibule to a church.
From 'ante-' (before) + 'church.' A rare term for architectural spaces that serve as entrance or preparation areas before entering the main church proper.
Some ancient churches had entire antechurches—covered porches or narthexes—designed to allow catechumens (those learning the faith) to listen before being allowed into the main worship space.
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