Prior to World War II, a collection of Chinese manuscripts and printed books made by him was in the Royal Library at Berlin, and another of porcelains of considerable historical importance in the Gotha Museum; most of the Hirth collection from the Staatsbibliothek in Berlin is now in Kraków.
, arrangement; SB, Staatsbibliothek zu Berlin; B&H, Breitkopf & Härtel, Leipzig (unless otherwise indicated); cat.
Part of its building was destroyed in 1939 during the German invasion and in May 1941 its collections were moved to the Staatsbibliothek Warschau, the University Library, SGH and the National Museum.
The Collectio Camerariana collection of letters (now held in the Staatsbibliothek München) includes his correspondence from 1621 as well as several letters from Philipp Melanchthon, Martin Luther, Ulrich Zwingli, Jakob Micyllus, Desiderius Erasmus and the poet Georg Fabricius, mostly written to his grandfather Joachim—these form an important source for the Protestant Reformation and the Counter-Reformation.
: Der Einband and Die malerische Ausstattung des Sakramentars, in: 'Das Sakramentar Heinrichs II. - Handschrift Clm 4456 der Bayerischen Staatsbibliothek München', commentary volume of the facsimile edition.
Starting in October 2007, the Library has been collaborating with the University of Passau and the Berlin State Library (Staatsbibliothek zu Berlin Preußischer Kulturbesitz) to create the Digital Library of Lao Manuscripts (ໂຄງການຫໍສະໝຸດດິຈິຕອລໜັງສືໃບລານລາວ).