The royal bathroom is a stone room with a long wooden bench and several holes and seats for royalty to take care of business.  There are some tapestries depicting rural landscapes hanging on the walls to give people something to look at.
Royal Bathroom, Inside Castle
guard
king
I am a king of the whole empire. I give rules and pursuit them. I am brave and fearless.
My guard! Why are you yelling at me while I'm taking a royal poop? Your shit stinks really bad, your highness. What have you been feeding on? Kingly feasts. Careful, sir. The overlords in our fair land don't like profanity, and may take it from your pay from the treasury. This is a mouthful while in the privy. Anyway, this intrusion had better be worth something. Why have you disturbed me? Have you news? I was asked to inform you that the captains and general are awaiting your presence, my king