 The name evolved to "Regium" (until the 8th century) then "Regina" (until the 11th century).A bishop of Riez is known from an early date, though the first bishop is purely legendary.At the beginning of the 5th century, a certain St. Prosper of Reggio in Emilia figures in the history of Riez and was perhaps its bishop; however, the first definitely known bishop, according to the "Catholic Encyclopedia", was St. Maximus (433–460), who succeeded St. Honoratus as Abbot of Lérins and who, in 439, held a council at Riez with a view to effecting ecclesiastical reforms in the churches of southern Gaul.