Historical Events in Church Annals for April 21:
Death of Saint Simeon Barsabae, the martyred bishop of Seleucia and Ctesiphon who was arrested by the King of Persia Sapor II and forced to watch over 100 of his fellow Christians be cruelly beheaded before he became the last. One reason the king was so furious is because Simeon had converted his own tutor Usthazanes.
Death of Pope Alexander II, the 156th successor of Peter who served twelve years and made religion and spirituality more important than politics as some of his successors had in trying to appease the German emperor Henry IV, but Alexander would have none of the machinations of the ambitious Holy Roman Emperor who, in retaliation, threw his support to antipope Honorius II.
The First Crusade arrives in Constantinople.
Death of Saint Anselm, Archbishop of Canterbury who was appointed to that post by his uncle Pope Alexander II. Anselm, a brilliant biblical scholar died in the city where he was born - Mantua, Italy.
Death of controversial French theologian Father Peter Abelard, a monk of Cluny whose work when he taught at the University of Paris was called into question by Saint Bernard of Clairvaux and several pupils of Saint Anselm. After writing the Dialectica and his autobiography Story of my calamities, he retired to the monastery of Cluny at Chalôn-sur-Saône where he died with the peace of mind that he had made peace with God .