kay's artistic contributions to the performing arts are well represented and documented at national museums, state galleries, art libraries, theatre collections and archives globally. public collections include: the performing arts collection, arts centre, melbourne; victoria & albert museum theatre collections, london; royal opera house collections, london; national gallery of australia, canberra; national library of australia, canberra; state library of new south wales, mitchell library, sydney; lipperheidesche kostümbibliothek, staatliche museen zu berlin; österreichisches theatermuseum, vienna; university of calgary, library, special collections, alberta, canada; macnay museum, tobin collection of theatre arts, san antonio, texas.