sentences:  The double-cube, in which the length of the room is twice its equal width and height, is another Palladianism, where all proportions are mathematically related.At the upper level, the room is surrounded by what is sometimes mistakenly referred to as a minstrels' gallery.While musicians may have played from this vantage point, its true purpose was to admit an audience; at the time of the Banqueting House's construction, Kings still lived in "splendour and state", or publicly.