A god or goddess: Each varies here by the specific visage seen, but ecumenically any such appearance indicates a higher consciousness, morality, and the divine spark within each of us.
Christ: An image of healing, forgiveness, protection, and renewal.
If crucified, an emblem of martyrdom, or giving too much of yourself (See also: Cross, Sacrifice).
Buddha: Introspection.
The path of positive speech and acting in accord.
Gandhi: Empowerment that comes from knowing your own mind.
A just cause fought for without violence. Peaceful negotiations.
A guru: Looking for, and dependence upon, spiritual insights from other people. Remember that your own heart is the best guru to guide your life.
Mother Teresa: The highly underestimated power of gentility, kindness, and compassion.
Moses: Redemption that first requires the trying of your beliefs.
A wizard: Mastery over the elements, and the ability to foresee the consequences of actions. Alternatively, a stage magician represents trickery and illusion meant to fool people.
King Arthur: Wise and peaceful leadership. Having a real understanding of equity.
Merlin: A tutorial image from your Higher Self who helps you see things differently, from a more metaphysical perspective.
Kings and queens: People, situations, or ideals in your life that have some authority over you.
The questions to ponder here are how much control do they have and how healthy is it for you? Look at other elements in the dream to determine this. Alternatively, these may be reflections of your own Higher Self, and self-rulership.
Mary: An alternative image of the primordial goddess, who through obedience and faith gave birth to the Messiah. [1]