He also crossed the Danube to fight against the Carpi, defeating them in both 297 and 300. Even though he was a opponent of Christianity, Galerius ended the Diocletianic Persecution of Christians when he issued the Edict of Toleration in Serdica (modern-day Sofia) in 311. Certified, Graded and Encapsulated by NGC. You Will Receive the Same Type of Coin and Condition Shown, Certificate Number Will Vary As Stock Photos Are Used.