Oldcastle Revolt religious beliefs were considerably influenced by Lollard cleric William Swynderby, who preached in Almeley during his youth. Lollardy was a politico-religious movement initiated by prominent theologian John Wycliffe in the 1370s during his service in the University of Oxford. Lollard beliefs were outlined in the 1395 The Twelve Conclusions of the Lollards, which dealt with their opposition to capital punishment, rejection of religious celibacy, and belief that members of the Clergy should be held accountable to civil laws. The Conclusions also rejected pilgrimages, ornamentation of churches, and religious images because these were said to take away from the true nature
John Wycliffe "Of Antichrist", remained uncompleted. While he was saying Mass in the parish church on Holy Innocents' Day, 28 December 1384, he suffered a stroke, and died as the year ended. Wycliffe was 64 years old. The Anti-Wycliffite Statute of 1401 extended persecution to Wycliffe's remaining followers. The "Constitutions of Oxford" of 1408 aimed to reclaim authority in all ecclesiastical matters, and specifically named John Wycliffe as it banned certain writings, and noted that translation of Scripture into English by unlicensed laity was a crime punishable by charges of heresy. The Council of Constance declared Wycliffe a heretic on 4 May