We ask you, urgently: don't scroll past this
Dear readers, Catholic Online was de-platformed by Shopify for our pro-life beliefs. They shut down our Catholic Online, Catholic Online School, Prayer Candles, and Catholic Online Learning Resources essential faith tools serving over 1.4 million students and millions of families worldwide. Our founders, now in their 70's, just gave their entire life savings to protect this mission. But fewer than 2% of readers donate. If everyone gave just $5, the cost of a coffee, we could rebuild stronger and keep Catholic education free for all. Stand with us in faith. Thank you.Help Now >
Sylvester Mazzolini
FREE Catholic Classes
(M OZOLINI, also P RIERIAS )
Theologian, b. at Priero, Piedmont, 1460; d. at Rome, 1523–sometimes confounded with Sylvester Ferrariensis (d. 1526). At the age of fifteen he entered the Order of St. Dominic. Passing brilliantly through a course of studies he taught theology at Bologna, Pavia (by invitation of the senate of Venice ), and in Rome, whither he was called by Julius II in 1511. In 1515 he was appointed Master of the Sacred Palace , filling that office until his death. His writings cover a vast range, including treatises on the planets, the power of the demons, history, homiletics, the works of St. Thomas Aquinas, the primacy of the popes. He is credited with being the first theologian who by his writings attacked publicly the subversive errors of Martin Luther. John Tetzel's productions against the arch-reformer are called by Echard scattered pages ( folia volitantia ), and Mazzolini stands forth as the first champion of Roman Pontiffs against Luther. The heresiarch replied to Mazzolini's arguments; the latter published rejoinders, and there was a regular controversy between the innovator and the defender of the ancient Faith. The necessity of promptness in attack and defence will account for defects of style in some of his writings. His principal works are: "De juridica et irrefragabili veritate Romanæ Ecclesiæ Romanique Pontificis" (Rome, 1520); "Epitoma responsionis ad Lutherum" (Perugia, 1519); "Errata et argumenta M. Lutheri" (Rome, 1520); "Summa Summarum, quæ Sylvestrina dicitur" (Rome, 1516), reprinted forty times; an alphabetical encyclopedia of theological questions; "Rosa aurea" (Bologna, 1510) an exposition of the Gospels of the year; "In theoricas planetarum" (Venice, 1513).
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.

-
- Stations of the Cross
- Easter / Lent
- 5 Lenten Prayers
- Ash Wednesday
- Living Lent
- 7 Morning Prayers
- Mysteries of the Rosary
- Litany of the Bl. Virgin Mary
- Popular Saints
- Popular Prayers
- Female Saints
- Saint Feast Days by Month
- Pray the Rosary

Pope Francis’ April Prayer Intention: Using Technology to Strengthen Human Connections

Finding Peace Through Prayer in a World of Worry

Trump Administration Withholds Federal Grants from Planned Parenthood Over DEI and Civil Rights Concerns
Daily Catholic
Daily Readings for Wednesday, April 02, 2025
St. Francis of Paola: Saint of the Day for Wednesday, April 02, 2025
Prayer for God's Help in Daily Actions: Prayer of the Day for Friday, March 14, 2025
Daily Readings for Tuesday, April 01, 2025
St. Hugh of Grenoble: Saint of the Day for Tuesday, April 01, 2025
- To Perceive Animals as God's Gifts: Prayer of the Day for Thursday, March 13, 2025
Copyright 2025 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 2025 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.