The partial estate Ludwig von Bertalanffy 2 (TNL-LvB-2) is the most extensive partial estate. It includes 105 archive boxes (and one supplementary box: 52b), 1 large format folder, 1 roll box, and the estate library of Ludwig von Bertalanffy - part stock TNL-LvB-2 in free standing in the Bertalanffy Archive:

1.: 20 archive boxes [1–20]: works by Ludwig von Bertalanffy (monographs, articles, lectures, talks, drafts, reviews) on various fields of research (General and Theoretical Biology; General and Applied Systems Theory; Cancer Research and Fluorescence Microscopy; Postal History; Cultural History and Anthropology) in various forms and stages of elaboration (manuscripts, typescripts, copy, print, AV media),

2.: 8 archive boxes [20–28] with correspondence (letters to and from Bertalanffy; letters from third parties to third parties; family correspondence; miscellaneous correspondence volumes);

3.: 23 archive boxes [29–52]: life documents (personal and family documents, photographs, portraits, death mask, official documents and records; curricula vitae and biographical material, lists of works/bibliographies, a very extensive collection of work documents, travel documents, financial documents, three-dimensional objects),

4.: 37 archive boxes [53–90] (partly also in freehand arrangement): collections:

[53–60] Crypto estate of Maria von Bertalanffy (1904–1981) (works, correspondence, life documents, collections),

[61–81] Crypto estate Felix D. Bertalanffy (1926–1999) (works, correspondence, life documents, collections),

[82–86] Works on Ludwig von Bertalanffy (monographs, articles, reviews),

[86] Symposium in Honor of Ludwig von Bertalanffy On the Occasion of his 70th Anniversary (September 19, 1971),

[86] Festschrift in Honor of Ludwig von Bertalanffy – Unity Through Diversity (Gray and Rizzo, 1973),

[86] Works by other authors,

[87] Stamps & Postal History,

[47] Images,

[88-90] Three-dimensional objects (film and photo cameras, equipment & accessories),

5.: estate library of Ludwig von Bertalanffy – partial stock (stored as a special collection in the Bertalanffy Archives together with the partial holdings from the partial estate Ludwig von Bertalanffy 1).

6.:  12 archive boxes [91–103 ]: Audio-Visual and digitized media (audio tapes, videos, 8mm & Super-8 films):

[91-94 ]: audio documents (10 tape reels, 19 tape cassettes).

[91 ]: 1 video

[95-103 ]: 87 films (8 mm & Super-8)

7.:  2 archive boxes [104–105]: estate enrichment (works by Ludwig von Bertalanffy, correspondence, life documents, collections, documents on the Ludwig von Bertalanffy partial estate 2).