Johann Theodor de Bry

He also published 'Emblemata secularia,' 1596, and added considerably to the collection of Portraits of Illustrious Persons, begun by his father.

Sometimes before 1613, he moved the enterprise from Frankfurt to Oppenheim, where the firm published important works by the English Paracelcist physician Robert Fludd, and the Bohemian Michael Maier (also a follower of Paracelsus) who had served as physician to Emperor Rudolph II.

Many of the works printed by De Bry also featured engravings by his son-in-law Matthäus Merian, for example A Hundred Ethico-Political Emblems by Julius Gulielmus Zincgreff (1619) which is dedicated to and celebrates the Elector Palatine Frederick V (Oppenheim's ruler).

Historian Frances Yates suggests the De Bry publishing house had close ties to the Elector's court at Heidelberg given that it printed works by supporters of Frederick and the short-lived attempt to have him installed as King of Bohemia.

She also points out the important role it played in publishing works (such as those by Fludd and Maier) in defense of the Fraternity of Rosicrucians.