(Lat. anulus piscatoris). Papal signet ring that has an image of Peter casting out or drawing in a net. with the name of the current pope above it or around the edge; used from the 13th to the 15th c. to seal private papal letters, from the 15th to the 19th c. to seal papal briefs (see Breve); hence the formula datum sub anulo piscatoris (given under the ring of the fisherman).
Edited by: Erwin L. Lueker, Luther Poellot, Paul Jackson
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