PersecutionPersecution ended with the capture and death of Emperor Diocletian in 305. The papal office however, remained empty for 2 more years.
Lapsed Christians (lapsi)Marcellus ordered that Christians who denied Christ to escape persecution, must perform a public penance that he orders. This order resulted in fierce protest which led to bloodshed. The Liber Pontificalis says that he appointed presbyters over each district to oversee the completion of the public penances and baptisms as required.
Synod of Elvira (305-306)Prior to the election of Marcelius, a synod of bishops gathered in Spain. Celibacy was declared for clergy, and to combat the growing sex issues, the only female workers permitted in their houses had to be sisters or daughters. Homosexuality was banned. The synod also prohibited Christians from eating, marrying, or having sex with Jews.
DeathEmperor Maxentius had Marcellus siezed in 308-309 for the bloodshed resulting from his penance orders, and placed into exile. The date of his death is uncertain.
303-311: The Third Persecution
305-311: Eastern Roman Emperor, Galerius
306-307: Western Roman Emperor, Severus II
306: Synod of Elvira forbids eating, marriage, or sex between
Christians and Jews
308-313: Western Roman Emperor, Maximinus Daia