The supplies of food that he dedicated to famine relief never ran out, which won him a reputation as a thaumaturge.

[1] In 920, he took his place at a synod in Constantinople called by Nicholas Mysticus concerning the emperor Constantine Porphyrogenitus.

His reputation for miracles continued, as his face appeared to be Transfiguration during his funeral, and his body was held to have exuded the "Oil of Saints".

[2] In Saint Peter's honor, a cathedral was built in Argos, which was founded in 1859 by Bishop Gerasimos Pagonis and was inaugurated on April 18, 1865.

[4] After a lengthy search, his relics were located at a monastery near Rome; they were returned to Argos in 19 January 2008[5] and now reside in St. Peter's Church.