Skip to content

We ask you, humbly: don't scroll away.

Hi readers, it seems you use Catholic Online a lot; that's great! It's a little awkward to ask, but we need your help. If you have already donated, we sincerely thank you. We're not salespeople, but we depend on donations averaging $14.76 and fewer than 1% of readers give. If you donate just $5.00, the price of your coffee, Catholic Online School could keep thriving. Thank you.

Help Now >

John of Roquetaillade (de Rupescissa)

Free World Class Education
FREE Catholic Classes

Franciscan alchemist, date of birth unknown; d. probably at Avignon, 1362. After pursuing the study of philosophy for five years at Toulouse, he entered the Franciscan monastery at Orléans, where he continued his studies for five years longer. His experiments in distillation led to the discovery of what he termed aqua vitæ , or usually quinta essentia , and commended as a panacea for all disease. His work as an alchemist forms the subject-matter of "De consideratione quintæ essentiæ" (Basle, 1561) and "De extractione quintæ essentiæ"; likewise "Libellus de conficiendo vero lapide philosophico ad sublevandam inopiam papæ et cleri in tempore tribulationis" (Strasburg, 1659). His false prophecies and violent denunciation of ecclesiastical abuses brought him into disfavour with his superiours, resulting in his imprisonment by Clement VI (1345) and Innocent VI (1356). While there he wrote in 1349 his "Visiones seu revelationes", and in 1356 "Vade Mecum in tribulatione" and "Ostensor" (in Brown, "Fascicula rerum expetendarum et fugiendarum", III, London, 1640). His other works include commentaries on the Sentences and on the "Oraculum Cyrilli", "Fragmenta revelationum", "Apologus propheticus", "De famulatu philosphiæ ad theologiam".

Join the Movement
When you sign up below, you don't just join an email list - you're joining an entire movement for Free world class Catholic education.

Prayer of the Day logo
Saint of the Day logo
What to do when your children leave the Faith

What to do when your children leave the Faith

Speakin' with the Deacons
Live Wednesday Feb. 28th @ 10am PDT
Join US LIVE on YouTube

Catholic Online Logo

Copyright 2024 Catholic Online. All materials contained on this site, whether written, audible or visual are the exclusive property of Catholic Online and are protected under U.S. and International copyright laws, © Copyright 2024 Catholic Online. Any unauthorized use, without prior written consent of Catholic Online is strictly forbidden and prohibited.

Catholic Online is a Project of Your Catholic Voice Foundation, a Not-for-Profit Corporation. Your Catholic Voice Foundation has been granted a recognition of tax exemption under Section 501(c)(3) of the Internal Revenue Code. Federal Tax Identification Number: 81-0596847. Your gift is tax-deductible as allowed by law.