 In the 6th century the bishops of Apulia were directly subject to the Roman pontiff.It was not until after the Byzantine Patriarchs regained their control of Calabria and Apulia after the decree of Leo I that Bari became an archbishopric, and that situation changed when the Normans invaded Calabria and Apulia in the 11th century and returned the Churches of Calabria and Apulia to the Roman obedience.In 780 bishop Leontius was present at the Second Council of Nicaea.