[Officium]
Chair of St. Peter at Rome

[GradualeP]
Allelúja, allelúja
!Ps 106:15
v. Let the mercies of the Lord give glory to him, and his wonderful works to the children of men. Allelúja.
!Matt 16:18
v. And I say to thee: That thou art Peter; and upon this rock I will build my church. Allelúja.
