The Feast of Saint Peter in Chains

Edit:  it's a great feast, also known as Lammas, and commemorates the miracle of St. Peter being freed from his chains in prison by an angel so he could continue his mission.

If there's an analogy there, or a spiritual message you can come away with upon meditating on this miracle, thank God for it.

The significance of this feast seems to point at our current Peter and his own struggles with things as they are.

Here's the collect stolen from societas-regnum-christi:

O God, Who didst loose the blessed apostle Peter from his bonds and didst send him forth unharmed; loose, we pray Thee, the chains of our sins, and in Thy great mercy keep us from all evil. Through Christ Our Lord. Amen.

Photo from...travel folio...