In 1929 Walcker built a large organ for the World Exposition in the Palacio Nacional Montjuich (Barcelona, Spain) with 5 manuals, 168 ranks, 121 voices (+ 11 tr.). In the late 1960's this organ was rebuilt and enlarged to 6 manuals by OESA (Organería Española, Madrid). Meanwhile this organ is completely unplayable (as Michael Reckling, Spain says) and the last stoplist is irretrievably lost so I can't say too much about it here. You will find the original Walcker stoplist here and a photo of the OESA console here.



In 1965 a 6-manual central concole was built for the four organs of Mainz Cathedral (Germany), which is going to be replaced by a 4-manual console during the ongoing complete rebuilt until approx. 2026.



The large Barton theatre organ at Chicago Stadium (USA) also had a 6 manual console. The console seems to have been restored but the organ itself with its 61 ranks is gone. Here are the links to some photos of the console and the (former) stoplist of the organ.



The world's largest drawknob console has "just" 5 manuals but 522 drawknobs and a total of 796 controls. It belongs to the organ at the Naval Academy Chapel, Annapolis (USA).



Now, while you may doubt that a console with more than 5 manuals is really needed anywhere and would make sense ergonomically there is a museum in the US (who else would think of something like that!), the "House on the Rock" in Spring Green (Wisconsin, USA) , where you can have a look at even larger consoles that even make those giants mentioned above look teeny-weeny: One monster has 8 manuals, one three-partite console has 3 x 5 manuals, i.e. a total of 15 manuals!



