Aventinus retained this position until 1517, wrote a Latin grammar (Rudimenta grammaticae latinae; 1512) and other manuals for the use of his pupils, and in 1515 traveled in Italy with Ernest.
In his zeal for learning, he helped found the Sodalitas litteraria Angilostadensis, the "literary brotherhood of Ingolstadt", under the auspices of which several old manuscripts were brought to light;[1] however, it soon ceased to exist (1520).
[citation needed] He rejected auricular confession, objected to pilgrimages and indulgences, and opposed the claims of the hierarchy as excessive.
Aventinus, who has been called the "Bavarian Herodotus," wrote other books of lesser importance, and a complete edition of his works was published at Munich (1881–1886).
In his Chronik, Aventinus fabricated a succession of Teutonic kings stretching back to the Great Flood, ruling over vast swathes of Germany and surrounding regions until the 1st century BC, and involving themselves in numerous events from Biblical and Classical history.