The lavatory contains a long trough for which the knights can use for urination. Crude toilets are also included for defecation. The design is all stone walls with candles, and no privacy walls.
Lavoratory, Inside Castle
king
knight
I am a knight in the royal army. I am strong, brave and fearsome. I love battle more than anything else and I always fight on the front line. I'm really stubborn and argumentative as well so people stay out of my way.
Well hello there my king. Hello Sir Knight, are you hear to guard me during my evening urination? I would assume you to be safe in here my lord. Thank you, I shall feel much relief with you at my back while I relieve myself. I am glad to hear that my king, perhaps I should also relieve myself. Please, help yourself - but keep one hand on your sword at the ready. I will be sure to do so my king. Well, I must say - I feel much better now! I trust it was a satisfying wee? Oh yes!  Quite.  And yourself? It seems it may never end, too much drink. Time to return to the tavern, and fill up then!