The little that is known about Demetrius of Cyzicus… part 2

In my previous post about this obscure 11th century Byzantine bishop, I gave the 1959 entry by Beck. This drew upon and abbreviated the old French (1912!) DHGE (Dictionary of Ecclesiastical History and Geography) article. Many volumes of the DHGE are online somewhere. I know this because I have a directory full of volumes. But I was unable to find a link now. Since it is out of copyright, but inaccessible, I thought that I would make it available here. I will put the original French in a footnote.1 Here is what ChatGPT gives us for it. * * * * DEMETRIUS OF CYZICUS. — There is no reason to believe in two Demetriuses of Cyzicus, or to distinguish the polemicist from the canonist; instead we should adhere to Lequien, Oriens Christianus, II, 758. The only argument advanced by L. Petit, in the Dictionnaire de théologie catholique (D. T. C.), in favour of the existence of the former, in the tenth century, is the address preceding the short treatise on the Jacobites, written at the request…