Gregory the Great (Dialogues, II, vii) relates an account of Placidus being rescued from drowning by his fellow monk, Maurus, who, at Benedict's order, ran across the surface of the lake below the monastery and drew Placidus safely to shore.

[1] Of his later life nothing is known, but in an ancient psalterium at Vallombrosa his name is found in the Litany of the Saints placed among the confessors immediately after those of Benedict and Maurus; the same occurs in Codex CLV at Subiaco, attributed to the ninth century.

[3] He is the co-patron of Messina along with the Madonna of the Letter, and is the official patron of Biancavilla, Castel di Lucio, Montecarotto, and Poggio Imperiale.

[4] Because a large portion of Easton, Pennsylvania's Italian community originally came from Castel di Lucio, Placidus is given particular veneration with an annual parade through South Side on the Sunday before Labor Day.

The Sunday after is the Feast of the Holy Cross, celebrated by immigrants from the neighboring town of Santo Stefano di Camastra.