Which performer is associated with 'castle'?

Based on the clue 'castle community that the queen calls home', what is the answer? What is associated with: castle richmond is the title setting of an 1860 work by this author of barchester towers? Based on the clue 'castle rock in this novel is the fort where jack b...', what is the answer? Based on the clue 'castle that was the birthplace of st ignatius the ...', what is the answer? What is associated with: castles offered great protection until the 1400s when these large weapons came into use? Based on the clue 'castor pollux are the twin sons of this god', what is the answer? Based on the clue 'castor an ingredient in perfume comes from this bu...', what is the answer? Based on the clue 'castor has an apparent magnitude of 16 this star a...', what is the answer?