In Korean tradition, dreaming of a church or temple is read as auspicious. It is most often tied to 전반, 건강.
Entering a sacred place is the heart cleansed and worry lifting; praying inside, a wish granted. A locked door, help not yet near.
Tradition reads the symbol as an omen; psychology reads the same dream as a mirror of your present state. Describe your dream and both readings appear together. Interpret your dream