Moon Castle is a Palace that shines bright like crystal. Queen Serenity and Princess Serenity, as well as many other subjects lived there. The Inner Senshi and the feline advisers, Luna and Artemis, also resided in this palace. It was guarded, along with the rest of the Solar system, from outside invaders by Sailor Uranus, Sailor Neptune, and Sailor Pluto, though those Senshi were not known by the vast majority of those of the Inner Kingdoms, including that of the Moon. The Moon Castle was destroyed and left in ruins after the attack of the Dark Kingdom. And was restored to its former glory by Sailor Moon's power after her final battle with Metaria.