The painting is by the so-called Master of the Osservanza and dates from around 1440. Notice the lovely chasuble of the priest and the noble simplicity of the altar. The young man to the left is none other than our father among the saints, Antony of Egypt. The scene depicts his conversion. The artist has it taking place in the cathedral of Siena!
Here is another prayer for priests that one might say each day. It will be included in the prayerbook that is still in preparation.
A Daily Prayer for Priests
O Lord Jesus Christ, Who commanded
that the men whom You called and set apart
for the service of Your holy altars,
should themselves be holy:
grant such holiness to Your priests
that in them Your Father may take delight,
and Your Bride, the Church, find consolation.
Send the promised Paraclete upon them
to keep them firm in their faith
in the midst of an unbelieving world;
to keep them ardent in their love
among those that do not love You;
to keep them pure amidst the impure;
and to keep them for Yourself
amidst those who are as yet not Yours
– but whom You, O gentle Shepherd,
came to seek and to save.
Through the intercession of our most gracious Lady and Queen,
Your Mother, Blessed Mary Ever-Virgin,
give them grace so to serve You
among all the changes and chances of this passing world
that, at the hour of their death, they may be ready
to enter with You, O Eternal High Priest,
into the sanctuary not made by human hands,
where You live for ever
to make intercession for us,
and reign with the Father and the Holy Spirit,
one God, world without end.