Plett's Citadel, also known as Plett's House, served as the residence that Jedi Master Plett constructed on Belsavis circa 88 BBY. He utilized the location as a research lab. Following the arrival of several Jedi refugee families who allied with the Ho'Din, a significant number of the greenhouse caverns encircling the area were transformed into residential spaces. Subsequently, the Galactic Empire's military forces carried out a bombing raid on the house.