Describir: Robin Evans. <i>The Projective Cast: architecture and its three geometries</i> : Cambridge, Mass., and London: The MIT Press, 1995

  _____      ___      ____       ___     ______    __   __   _    _   
 / ____||   / _ \\   |  _ \\    / _ \\  |      \\  \ \\/ // | \  / || 
/ //---`'  / //\ \\  | |_| ||  | / \ || |  --  //   \ ` //  |  \/  || 
\ \\___   |  ___  || | .  //   | \_/ || |  --  \\    | ||   | .  . || 
 \_____|| |_||  |_|| |_|\_\\    \___//  |______//    |_||   |_|\/|_|| 
  `----`  `-`   `-`  `-` --`    `---`   `------`     `-`'   `-`  `-`  
                                                                      
  _____   
 |  ___|| 
 | ||__   
 | ||__   
 |_____|| 
 `-----`