# Verified against Divinum Officium (Monastic Tridentinum 1617), live
# kalendar check (2025-10-14) -- winner outright, Duplex, alone. Own
# proper collect, no unique antiphon of his own.
id: st-callistus
name: "St. Callistus I, Pope and Martyr"
rank: duplex
common: common-of-a-martyr-bishop
propers: "st-callistus"