– His contemporary and enemy, the author of Philosophumena (probably Hippolytus of Rome) relates that when Callixtus, as a young slave was put in charge of a bank by his master, Carpophorus, he lost the money deposited by other Christians. Callixtus then fled from Rome, but was caught near Portus.
199 BC – 217 BC – Callixtus was the deacon to whom Pope Zephyrinus entrusted the burial chambers along the Appian Way.
Callixtus was honored as a martyr in Todi, Italy, on August 14th. He was buried in the cemetery of Calepodius on the Aurelian Way and his anniversary is given by the 4th-century Depositio Martirum (Callisti in viâ Aureliâ miliario III) and by the subsequent martyrologies on the 14th October.
– He was martyred for his Christian faith and is a canonized saint of the Roman Catholic Church.