Gregory I, Pope. [Letter to Theodelind, queen of the Lombards, 603] in Gregorii I papae Registrum epistolarum 14.12, 2.431-32

[Letter from Pope Gregory I to Theodelind, queen of the Lombards]
The pope rejoices in the birth and baptism of Theodelind's son, and sends a report of the synod under Justinian [second council of Constantinople, 553] to make sure he learns the orthodox faith.
Online at Epistolae (See also Bibliographia record).