[The letter of Johannes Oporinus on Paracelsus]

Not very long after the death of Paracelsus, Johannes Oporinus, once assistant to Hohenheim, wrote a letter full of invectives against his late master. Although four copies of this letter are known up to now, there is still much uncertainty left about the date (1555, 1565), the address (Johann Weyer, Reiner Solenander, Weyer and Solenander), and the text, because the original letter has not been found yet. In our study a new found copy--the eldest yet known--of the letter is presented, which is included in an 'Oratio de Theophrasto Paracelso' held by Gervasius Marstaller in Jena (1570). According to Marstaller he had received his copy of the (undated) letter by Reiner Solenander. In an appendix the letter is edited after Ms. 991. University Library Erlangen.