Gaining his freedom at the instance of Hungarian magnates, he visited Melanchthon at Wittenberg, and in 152 4 became professor of Greek at the university of Heidelberg, being in addition professor of Latin from 1526.
After the war he retired into private life at Heidelberg.
Hertz himself gave an admirable account of the significance of his discoveries in a lecture on the relations between light and electricity, delivered before the German Society for the Advancement of Natural Science and Medicine at Heidelberg in September 1889.
In 1656 he became honorary professor at Heidelberg, and died on the 31st of August 1660.
Educated at the universities of Bonn and Heidelberg, he obtained a position in Florence through the influence of an Englishman, William Craufurd, but soon he entered the Prussian diplomatic service and was employed in Florence, in Constantinople and in Rome.
