A House Minor was a noble house that did not control a major planet or territory. Its power was based on control of just one industry or region. It did still have a say in Imperial politics. A house minor would typically owe loyaly or support to a great house. It was not unkown for a former great house that had fallen on hard times to become a house minor. For instance Duke Leto offered to allow his friend Prince Rhombur to found a house minor on Caladan and gave him control of one of the planets industries.