Feast of pope St Leo the Great He was born in Etruria and became Pope in 440. He was a true shepherd and father of souls. He constantly strove to keep the faith whole and strenuously defended the unity of the Church. He repelled the invasions of the barbarians or alleviated their effects, famously persuading Attila the Hun not to march on Rome in 452, and preventing the invading Vandals from massacring the population in 455.
Leo left many doctrinal and spiritual writings behind and a number of them are included in the Office of Readings to this day. He died in 461.
From Universalis today

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Collect

O God, who never allow the gates of hell
to prevail against your Church,
firmly founded on the apostolic rock,
grant her, we pray,
that through the intercession of Pope Saint Leo,
she may stand firm in your truth
and know the protection of lasting peace.
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.
Amen.