Note:  Do not rely on this information. It is very old.


Calixtus, the name of three Popes. Calixtus I. was Bishop of Rome from 217 to 224, when he was martyred. He is said to have been originally a slave. Calixtus II., previously Guido, Archbishop of Vienne, was elected pope in 1119, succeeding Gelasius II., who had been expelled. Calixtus III. was chosen in 1168 as anti-pope to Paschal III. The title Calixtus III. was also assumed by Alfonso Borgia, elected pope 1455.