Heinrich Ritter[1] von Zeissberg (8 July 1839, in Vienna – 27 May 1899) was an Austrian historian.
Zeissberg studied history at the university of Vienna, receiving his PhD in 1862.
In 1872, he was appointed professor at the university of Vienna, and here he was a tutor of history to the crown prince Rudolph.
In 1892, he was named director of the Vienna institute for historical research, and in 1896 director of the imperial court library at Vienna.
[2][3] Zeissberg's writings deal mainly with the history of Austria and of Poland, such as: Dealing with more recent times he wrote: He edited three volumes of the Quellen zur Geschichte der Deutschen Kaiserpolitik Oesterreichs während der französischen Revolutionskriege 1790-1801 (Vienna, 1882-1885, 1890).