But not the surname-of-protagonist television show, Castle.
Some overlap with House Tropes since people usually live in castles. And Royalty and Nobility Tropes because they're usually the ones doing the living. And Luxury Tropes because it's a symbol of those royals' large finances.
- Big Fancy Castle
- Bright Castle: Bright castle that signifies a good place, usually.
- Haunted Castle
- Ice Palace
- Ominous Floating Castle
- Palatial Sandcastle: Sandcastle you can live in.
- Storming the Castle