GALLERY OF DESIGNS — click a thumbnail for a larger version    Theatres
	If we make the stage larger, the main doorways move farther apart, and we can fit in twice as large an audience.  But this version still has only five rows of seats.  Each point of the triangle has been filled, not with short additional rows of seats, but rather with a backdrop.  It consists of a row of upright triangular prisms (or periaktoi) that can be rotated in unison to reveal any of three different scenes.