On the death of Proculus, Pelinus was designated bishop of Brindisi, but functionaries of the Byzantine empire deported him to Corfinio, where he was condemned to death and executed with his disciples on 5 December, probably in 662.
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The former Corfinio Cathedral, now a basilica, is dedicated to him, and his cult in the Marsica area is attested by the name of the small town of San Pelino, a frazione of Avezzano, where he is said to have passed by on his return from a journey to Rome.