Galerius

Galerius (c. 258–311), born near Serdica and nicknamed Armentarius, the herdsman, rose through the army and married Diocletian's daughter Valeria. When the Tetrarchy was created in 293 he became Caesar, and defeated the Persian king Narseh at Satala in 298. He also crossed the Danube to defeat the Carpi.

After Diocletian's abdication in 305 he ruled as senior Augustus, contending with Constantine and Maxentius. A fierce persecutor of Christians, he nonetheless issued the Edict of Serdica in 311 ending the persecution, and died that May at his palace of Felix Romuliana.