“The name given to a place where one is interned to contemplate the divine mysteries. However, the word comes from mon (moon) and aster (stars), a place of the moon and the stars. Yet when we enter into one and ask if the monks or priests there believe in astrology, you might find that you get sprinkled with holy water. People that have made a study of stained-glass windows or church architecture will have seen many secret sabean symbols.
Now our banks and fast-food eateries seem to appear subliminally like churches; porticos, towers, stained-glass and all. Not that anyone has noticed.”

Source: Astro-Theology Etymology and Sidereal Mythology Tarot Astronomy