I'm currently building a huge medieval castle in my survival world but I need some ideas to fill up the space inside. Besides being semi-realistic I'm making functional as well. It's going to be my main base of operations as I explore and build more. I've already got the rooms listed below. Ideas for more rooms or just ideas to fill up the space are greatly appreciated.

Great hall
Throne room
Dining room
Council room/map room
Kitchen
Brewery
Stables
Armory
Forge
Storage room
Bedrooms
Library/Lounge
Wizard's tower (For enchanting, brewing, and nether portal)
Garden/indoor pond room
Theatre
Guard towers
Private dock
Trophy room