Lucius took the lead of the Arian party at Alexandria after the murder of George of Cappadocia in 361, and was put forward by his party as the candidate for the see which they regarded as vacant. In 373, after the death of Athanasius, he was forced upon the reluctant Church of Alexandria by the Arian Emperor Valens, and according to Gregory Nazianzen a fresh persecution of the orthodox party at once began; and to this it is that Piamun alludes in the text.