208 p. : ill. col. b/n, indice, biografia ; 21 cm. This book presents some outcomes, of a broader research still on going, about the vision and the opera of a Master of the Roman School of Architectural Drawing, Mario Marchi (1900-1996). It offers an overview of his extensive work by combining, in the form of an Atlas, authorial Drawings and original Photographs of some famous masterpieces.