St. Peter and St. Paul (1st c.) were the foremost Apostles of Jesus Christ; St. Peter was the leader of the Twelve, while St. Paul followed Christ after His ascension into heaven. Together the two saints are the founders of the Church in Rome through their apostolic preaching, ministry, and martyrdom in that city. For more information about Sts. Peter and Paul please see https://www.catholiccompany.com/morning-offering/2019-06-29.