The model for the unbuilt 'Museum for Unlimited Growth'
for Philippeville, Algeria, 1939, designed by Le Corbusier
& Pierre Jeanneret, with a square plan of side 50 meters,
while the National Museum of Western Art in Tokyo is of side 41.
The beams protrude to make additional construction easier.
(From "Le Corbusier, Oeuvre Complète 1938-46", Zurich)

The model of the museum for Philippeville,
clearly showing its spiral growing system
The "Oeuvre Complète vol. 4" does not illustrate any drawings
of the museum but gives model photos only. I do not know why.
(From "Le Corbusier, Oeuvre Complète 1938-46", Zurich)

The interior model of the museum for Philippeville
One goes through a U-turn ramp from the central hall up to the 2nd floor's spiral exhibition rooms.
This space composition is almost the same as the National Museum of Western Art in Tokyo.
The exhibition wall is 1,000 m long at the early stage, growing to 3,000 m in this model.
(From "Le Corbusier, Oeuvre Complète 1938-46", Zurich)

�áComparison�â
The interior model of the National Museum for Western Art in Tokyo
When it would have grown by one spiral circuit,
it would be almost the same size as Philippeville.
(From "Le Corbusier, Oeuvre Complète 1952-57", Zurich)