1. What was St. Callixtus I’s father’s name?
2. Who was St. Callixtus I’s master when he was a slave?
3. Which book is a biography of St. Callixtus I?
4. Where was St. Callixtus I a prisoner?
5. Who ordained St. Callixtus I a deacon?
6. When was St. Callixtus I pope?
7. Who was the antipope opposed to St. Callixtus I?
8. Whom did St. Callixtus I excommunicate?
9. Why did St. Hippolytus accuse St. Callixtus I of laxity?
10. When is the feast day of St. Callixtus I?