Giovanni il Buono da Siponto
Abbot in Dalmatia
Who they were
He was an abbot who built the monastery of Saint Michael on the island of Mljet, off the Dalmatian coast opposite Monte Gargano. The Roman Martyrology for 5 September names him among the blessed.
The miracles
The source does not describe the miracles approved in the cause.
Why that counted as sanctity
The Roman Martyrology for 5 September honours him as a blessed abbot who founded the monastery of Saint Michael on Mljet.
The cause
The cause continues. No postulation address is published here yet. Favours received through this person’s intercession, and offers of help, are best sent to the religious order or congregation they belonged to, or to the diocese where the cause was opened; either will pass them to the postulation.
Checked against the sources listed on 22 September 2026. Corrections welcome.