Gates, lift high your heads,
raise high the ancient gateways,
and the king of glory shall enter.
Psalm 24: 7 (New Jerusalem Bible)
The Porta Ardeatina is one of the gates in the Aurelian Walls of Rome. It is between the Porta San Sebastiano (known originally as the Porta Appia) and the Porta San Paolo. By the 8th century this gate was closed. Today it is little more than a "window," with the portals of the Via Cristoforo Colombo nearby.
You can see the opening of the Porta Adreatina to the left of the four arches in the ancient wall that were opened for the traffic of the Via Cristoforo Colombo, a highway built by Mussolini from the Circus Maximus to the sea.
Anglican Collect for The Second Sunday of Advent
Merciful God, who sent your messengers the prophets to
preach repentance and prepare the way for our salvation:
Give us grace to heed their warnings and forsake our sins,
that we may greet with joy the coming of Jesus Christ our
Redeemer; who lives and reigns with you and the Holy
Spirit, one God, now and for ever. Amen..
1979 Book of Common Prayer