470 years ago on this date, another Easter Sunday, Ignatius of Loyola and his first companions elected Ignatius as the first superior of the new group, a year following the Church's approval of the society. Just two days before his election, the companions went to the Basilica of Saint Paul outside the Walls to profess their vows.
With these events, Loyola had more concrete points in following God's will in forming a new society of priests aiming to reform Christian culture under the Roman Pontiff.
The account is here.