Named Heigeliana, the inventory is made up of the respective estates of the brothers Karl August (1835–1905) and Karl Theodor Heigel (1842–1915). While the collection of Karl August Heigel (Heigeliana II) consists of three large and 13 small boxes and three metres of shelving, the estate of his brother Karl Theodor (Heigeliana I) fills 20 boxes.
Karl Theodor Heigel was an archivist and historian. After studying in Munich, Heigel was employed there as an archival official at the Bayerisches Hauptstaatsarchiv (Bavarian Main State Archive) in 1872. In 1873, he completed his postdoctoral qualification as a private lecturer in history at the Ludwig-Maximilians-University (LMU). Successively, Heigel rose within the Munich scientific community and, in 1884, he finally received a tenured professorship in history at the LMU. In 1885, he was appointed director of the Historical Seminar. While Heigel was already a member of the Bayerische Akademie der Wissenschaften (Bavarian Academy of Sciences) in 1875, he was admitted to the Preußische Akademie der Wissenschaften (Prussian Academy of Sciences) as a corresponding member in 1904. Karl Theodor Heigel was made a knight in 1897, as was his brother back in 1881.
The collection from the provenance of Karl Theodor Heigel contains notes for lectures and other manuscripts. There are also lecture transcripts and letters to Karl Theodor Heigel, for example nine letters by the writer and Nobel Prize winner Paul Heyse (1830–1914) (cf. Heigeliana I 41.3) and by Felix Dahn (1834–1912) (cf. Heigeliana I 41.2), who, like his brother Karl August, belonged to the poets’ association "Die Krokodile" (Crocodiles).
Parts of the estate have been digitised for bavarikon and are available here: