Skip to content
Deacon Keith Fournier 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 Slotanus

Free World Class Education
FREE Catholic Classes

(SCHLOTTANUS, VAN DER SLOOTIEN), (JOHN GEFFEN)

Polemical writer; born at Geffen, Brabant; died at Cologne, 9 July, 1560. He joined the Dominican order at Cologne about 1525. For many years he ably defended the Faith against the heretics by preaching and writing. Later he taught sacred letters at Cologne, and in 1554 was made a doctor of theology. About this same time he became prior of his convent at Cologne, and as such exercised the offices of censor of the faith and papal inquisitor throughout the Archdiocese of Cologne and the Rhine country. In the discharge of these responsible duties Slotanus came into conflict with the learned Justus Velsius, who in 1556, on account of heretical teachings, was obliged to leave Cologne. The vehement writings which Velsius afterwards published against the Cologne theologians moved Slotanus to write two works in which nearly all the heretical doctrines of his time are discussed with admirable skill.

Among his various works those most worthy of mention are: "Disputationum adversus hæreticos liber unus" (Cologne, 1558); "De retinenda fide orthodoxa et catholica adversus hæreses et sectas" (Cologne, 1560); "De barbaris nationibus convertendis ad Christum" (Cologne, 1559). In the last-named work Slotanus witnesses to the ardent missionary zeal which fired the religious men of his time.

Baptism, First Communion, Confirmation & Rosaries - Up to 15% OFF

To all our readers, Please don't scroll past this.

Deacon Keith Fournier Today, we humbly ask you to defend Catholic Online's independence. 98% of our readers don't give; they simply look the other way. If you donate just $5.00, or whatever you can, Catholic Online could keep thriving for years. Most people donate because Catholic Online is useful. If Catholic Online has given you $5.00 worth of knowledge this year, take a minute to donate. Show the volunteers who bring you reliable, Catholic information that their work matters. If you are one of our rare donors, you have our gratitude and we warmly thank you. Help us do more >

Never Miss any Updates!

Stay up to date with the latest news, information, and special offers.

Free Online Catholic Classes for Anyone, Anywhere - Click Here

Catholic Online Logo

Copyright 2021 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 2021 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.

Subscribe to Our Newsletter!