WHAT HAPPENED IN 217.
Look what happened the 217.

Roman Emperor Caracalla is assassinated (and succeeded) by his Praetorian Guard prefect, Marcus Opellius Macrinus. (8. April 217)

The Romans, led by Gaius Flaminius, are ambushed and defeated by Hannibal at the Battle of Lake Trasimene. (21. June 217. BC)

Battle of Raphia: Ptolemy IV Philopator of Egypt defeats Antiochus III the Great of the Seleucid kingdom. (22. June 217. BC)

The papacy of Zephyrinus ends. Callixtus I is elected as the sixteenth pope, but is opposed by the theologian Hippolytus who accuses him of laxity and of being a Modalist, one who denies any distinction between the three persons of the Trinity. (20. December 217)