Describir: The construction of Gothic cathedrals :

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