(1) A church may symbolize the self, the totally integrated psyche, with all its elements organized as a harmonious whole centred on whatever, in terms of your individual personality and ‘destiny5.
constitutes the supreme value of truth. (For self)
The image may therefore be taken as a sign that your unconscious is urging you to ‘centre” yourself, to put an end to the fragmentation which results in your going off in opposite directions; to ‘pull yourself together” in the almost literal sense of unifying all the currently conflicting parts of you into a creative and fulfilling collaboration or commingling.
Other buildings - a house, or just a room - may represent your psyche. The fact that your dream presents the psyche in the image of a church means that you are being invited to perceive the self as something sacred - that is, something of supreme value and perhaps in some way transcendent.
(2) The church may symbolize, not the total psyche, but some most valuable (‘sacred”) part of it which holds the meaning of your life - the key to your true destiny.
(3) In primitive times a sacred place was regarded as the birthplace of the tribe’s original - divine - ancestor(s). In the same way, your dream image of a sacred place may be a reminder that you are not a worthless creature living a meaningless life; that vour self is a divine reality’, something of supreme value and to be taken with the utmost seriousness; that you are not only to love yourself but also to revere yourself.
(4) The church - or what is going on inside it, or how you in the dream are reacting - may represent your feelings about religion or about some institutionalized form of religion.
(5) For church crypt see Cave, Cellar.
(6) Is there someone in the church - a priest or (other) holy person, or someone you love dearly and respect deeply (father or elder brother, for instance)? If so, the figure may represent the self, the part of you that transcends the ego (for self).
See also Wise Old Man / Woman.