If seen in gloom or at night, it predicts sadness of a temporary nature. Safe places (could be temporary), sanctuary, perhaps help is on its way, coming to you. Sanctuary; temporary safety.
To dream that you are in an abbey is confirmation that you are safe and have no cause to worry needlessly, though this safety may only be temporary.
To come upon an abbey unexpectedly is a sign that there is help around the corner. Apply this to any worries you may have and look at the other symbols in the dream and how they relate to this.