Historical Events in Church Annals for June 30:
Death of Saint Otto, bishop and missionary from Bamberg who strove to heal the breach between Pope Paschal II and the Holy Roman Emperor Henry V during a time when there were five succeeding antipopes. Otto was canonized by Pope Clement III in 1189.
Pope Benedict XIV releases the second official encyclical - Quanta cura which treats the subject of forbidding traffic in alms.
Pope John Paul II issues his Apostolic Letter Ad tuendam fidem dealing with dissident theologians and those who keep trying to push for ordination of women as the Holy Father litterally takes the bull by the horns with this papal bull calling for disciplinary measures against those who teach a tune other than what they must as members of the One, Holy, Catholic and Apostolic Church.