Stables were essential for a castle. Travelers in those days could either walk, or be conveyed by horse. Whether riding or being drawing a wagon or carriage, their horses would need rest and food at every stop. Besides accommodating travelers, the castle’s stables housed the horses of its inhabitants, although the only ones rich enough were knights or nobility.
The head of the castle stables was called the marshal. He would coordinate all of the stable hands and stable boys that fed the horses and assisted their riders. Castles would often have a “valet parking” system, where the guest would leave his horse with a stable hand, who assigned it a stall and would feed and water it.