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

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