A plan of the stage for a production of Die Walküre. It shows the sizes of the different set pieces, with two large backstage ramps leading down, in stages, to the main flat foreground stage.
Brewster, Ben, and Lea Jacobs. Fig 4.8. Theatre to Cinema: Stage Pictorialism and the Early Feature Film. 1997. Oxford University Press, 2016.
Citation
Moynet, Georges. La machinerie théâtrale: Trucs et décors, explication raisonnée de tous les moyens employés pour produire les illusions théâtrales, Paris, Librairie illustrée, 1893, p. 364.