The protocol of the Spanish court came to be, in the Golden Age, to excesses only surpassed in the Vienna of Franz Joseph. An honored Spanish lady should always keep her feet hidden.
And the exigencies of the court etiquette at this point reached such extremes that no one could reference the feet of the queen, under penalty of incurring serious contempt. Perhaps we could find here the influence of the Semitic tradition. And the truth is that our kings lived as subject to the rules of the court as could be the High Priest to the rules of worship. Philip III, for example, was about to burn to death without anyone coming to his aid: the official responsible for keeping vigilance of the royal seat was not present!