Microfilm contains correspondence of many Austrians who were active in the American mission field, including St. John Neumann, Bishop of Philadelphia; Frederic Baraga, Bishop of Marquette; Father Caspar Rehrl, founder of the Sisters of St. Agnes; Father Joseph Salzmann, founder of St. Francis Seminary in Milwaukee; Father Francis X. Pierz, missionary, especially in Minnesota; Father John Stephen Raffeiner of New York.

Other correspondents include Vincentius Eduard Milde, Archbishop of Vienna; Simon Bruté, Bishop of Vincennes; Edward Dominic Fenwick, Bishop of Cincinnati; Benedict Joseph Flaget, Bishop of Bardstown and Louisville; John Frederick Résé, Bishop of Detroit; and many other members of the American hierarchy. Letters were primarily concerned with conditions in the mission areas and requests for money.

Correspondence is in German, Latin and French.

Microfilm of the Berichte (2 reels) obtained from the Library of Congress by Joseph Gregorich in 1946.

The collection contains English summaries of all documents on microfilm (except account books and ledgers). The summaries are on catalog cards housed in the University Archives reading room.

Publications in the printed material series include “Berichte der Leopoldinen-Stiftung im Kaisertume Osterreich" from 1831 to 1904; “Statuten zur Unterfukung der Catholitchen Mifftonnen in America gebildeten Bereines unter dem namen Leopoldinen-Stiftung” [English translation: "Statutes for the support of the Catholic Church in America under the name Leopoldine Foundation"]; “Annalen der Verbreitung des Cauben” from 1841 to 1898 (incomplete set); and the book “Die Leopoldinen-Stiftung, 1829-1914” by Gertrude Kummer, 1966.