The Sailor Senshi's Castles also known as the "Solar System Castles" are castles that were given by Queen Serenity, following their births, to the Solar System Princesses. These castles appeared in the manga only, the first mention of them is during the "Dream Arc" (act 41) when the Sailor Senshis ask for more power to help Sailor Moon. The castles have different shapes and orbiting the home planets of the Senshi.