Windows within a building may be thematic, for example: within a church - episodes from the life of Christ; within a parliament building - shields of the constituencies; within a college hall - figures representing the arts and sciences; or within a home - flora, fauna, or landscape.
Namen vitrajnega okna je ne dovoliti, da se v stavbo vidi od zunaj ali celo predvsem svetlobo spustiti v prostor, temveč jo nadzorovati.