The Music Department at the University Library of Southern Denmark in Odense has through donations and acquisitions since 1997 achieved the status of research archive of specialised jazz studies.
The collection contains more than 50 sheets of music, 49 books, 1516 78-rpm records, 482 LPs, 300 CDs and a number of journals, some of which are not to be found in any other Danish library.
There are also many catalogues, press cuttings and manuscripts for radio broadcasts and articles as well as a fine collection of more than 3000 photos of musicians and orchestras, many of which were taken by Rosenkrantz himself.
The library received a collection from Svend Asmussen in September 2003 consisting of 14 LPs, 33 CDs, 25 reel-to-reel tapes, 11 cassette tapes, 2 videos, 8 books and 7 journal issues plus 189 photos and a large collection of concert programmes, reviews, press mentions, posters, and other memorabilia covering all his career.
This collection contains many private papers, contracts and photos, plus instruments, microphones, cases, hats, portrait paintings, scrapbooks, posters, and other items, plus 2 LPs, 24 CDs and 10 books.
Since the introduction in 1991 of a rhythmical line of study at the Carl Nielsen Academy of Music Odense, the library's acquisition within the jazz genre has increased to the point that on 1 May 2007 the collection consisted of more than 900 books, 850 sheet music, 312 78's, 191 EPs, 4100 LPs, 4200 CDs, 179 DAT tapes and 73 videos plus a number of current and ceased to be published journals including older Danish publications.
The library has also received minutes of meetings, letters, applications and regulations, and other materials from the Danish Jazz Association (1970-1977) and a very fine donation in the form of Ole "Fessor" Lindgreen's scrapbooks (1957-2001) from his Big City Band in all of 13 volumes.