Claudia, I don't know how much help we can be at New York Public Library for
the Performing Arts at Lincoln Center, but if you want to contact me perhaps I
can give you some information.  NYPL really doesn't keep much of the
three-dimensional materials you are describing.  We have extensive holdings of
archival collections and other non-book ephemeral materials. NYPL at Lincoln
Center is divided into 4 research divisions--Theatre, Music, Dance and
Recorded Sound and a circulating collection.  We do have a museum program
which utilizes our collection materials in the exhibitions.  However, most 3
dimensional materials used are borrowed from outside sources.  Feel free to
contact me:
Mary Ellen Rogan, Archivist
Billy Rose Theatre Collection
New York Public Library for the Performing Arts
[log in to unmask]
212-870-1778