LM had asked about the Homilies of Pope Saint Leo the Great.
Finding "homilies" was a bit difficult, but searching for "sermons" worked much better:
Sermons of Pope Saint Gregory the Great at New Advent.org
And if you'd like to have them read to you in Latin by Father Reginald Foster you can go here (has Latin text, Latin audio, and English translation texts):
Sancti Leonis Magni Tractus