The tromp-l'oeil arch scene shown here was custom designed to adapt an Italian scene after Claude Lorrain (17th C.). This was a 'canvas installation' - painted in studio and later attached to the wall. The surrounding walls were then 'fauxed' to match the stone work of the central canvas. Scenes like this may also be done on slender wood stretchers or movable wood panels for future investment.
Historically this was common practice. For example, 'The Raising of the Cross' by Rubens, which sits on a freestanding display in Belgium, was painted on wood panels - the central panel alone measures 15' x 11'. Rembrand'ts 'Night Watch' was painted on a 12' x 14' canvas. Return to the initial Murals homepage and scroll to bottom to see images of those examples.