Vlad G.
Yelp
a mandatory visit for any architect.
consists of two buildings at the end of a cul-de-sac, Maison La Roche (which is the museum) and Maison Jeanneret (hosting now the foundation's administration) and has arguably the largest collection of le corbusier documents, drawings, photographs, paintings, etc.
corbu himself established the foundation as sole girator of his works. they not only host the artwork and documents he left them but also have decision power for any renovations of his buildings (see the current ronchamp addition controversy)
it was closed for renovations a few years ago but should probably be open by now.