Yves Hélory meurt le 19 mai 1303, en sa maison de Kermartin, près de Tréguier. Contemporain du roi saint Louis, de saint Thomas d'Aquin, de Dante et de Giotto, il est venu au monde trente ans après la mort de saint François d'Assise et de saint Dominique. Le rayonnement de sa sainteté est tel qu'à l'annonce de sa mort, une foule de gens accourent pour lui rendre hommage.

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Yves Hélory died on the 19 May 1303, in his manor of Kermartin, near Tréguier. A contemporary of Saint Louis (Louis IX), Thomas Aquinas, Dante and Giotto, he was born thirty years after the death of Saint Francis of Assisi and Saint Dominic. The renown of his holiness was such that when his death was announced, crowds rushed from all around to pay homage to him.