O God, who in your providential design
willed that your Church be built upon blessed Peter,
whom you set over the other Apostles,
look with favor, we pray, on Leo our Pope
and grant that he,
whom you have made Peter’s successor,
may be for your people
a visible source and foundation
of unity in faith and of communion.
Through our Lord Jesus Christ, your Son,
who lives and reigns with you
in the unity of the Holy Spirit,
God, for ever and ever.
Collect of the Mass for the Pope
The Roman Missal, Third Edition
