His Holiness Pope Callistus I (in Latin Callistus) is the Pope number 16 of the Catholic Church.
was born in Roma, in the current country of Italy.
The Holy Father Callistus I initiated his pontificate in the year 217. He succeeded Pope Zephyrinus. His papacy lasted for 5 years, ending during the year 222. He was succeeded by Urban I, who would become the following bishop of Rome.