Soter, sometimes known as the Pope of Charity, was pope from 166 to 174 (the Vatican cites 162 or 168 to 170 or 177). He declared that marriage was valid only as a sacrament blessed by a priest. He was born in Fondi, Italy, and died, according to tradition, as a martyr. He was buried in the Callixtus cemetery in Rome. His feast day is April 22.
Apparently inaugurated Easter as an annual festival in Rome.
