Ss. Peter and Paul by Bartolomeo Vivarini
St. Augustine of Hippo, Sermon 295
O God, who didst give such grace unto thy holy Apostles Saint Peter and Saint Paul, that they were enabled to bear witness to the truth by their death: grant unto thy Church that, as in the beginning she was enlightened by their teaching, so by their intercession she may continue in the same unto the coming of our Lord Jesus Christ; who liveth and reigneth with thee, in the unity of the Holy Spirit, ever one God, world without end. Amen.
Basilica of St. Peter, Vatican City State