The first large-format slide projectors were built in the middle of the 20th century as background projectors for theaters and opera houses. The artists Professor Schneider-Siemmsen,<ref>[{{cite web|url=http://www.fanfaire.com/schneider-siemssen/index.html ]|title=The Cosmic Space of Gunther Schneider-Siemssen, stage set designer |publisher=Fanfaire.com |date= |accessdate=2013-03-12}}</ref> Professor Svoboda and [[Herbert von Karajan]] used the large format slide projectors as stage projectors in their artwork. In good cooperation with the technician Ing. Ludwig Pani,<ref>[http://www.pani.com/unternehmen/daten/e_daten.html?english ]{{dead link|date=March 2013}}</ref> they realized the first large format projections as an integrated part of their artwork.
