Pope St. Sixtus II (d. 258 A.D.) became the Roman Pontiff in the year 257 A.D. He helped mend the relationship between Rome and the Eastern and African churches over the problem of the rebaptism of converted heretics, a controversy which threatened schism. For more information about Pope St. Sixtus II please see https://www.catholiccompany.com/morning-offering/2019-08-07/