Konstantinos 66 was bishop of Metra (Metropolis, in either Asia or Pisidia); in 787 he attended the Second Council of Nikaia (the Seventh Ecumenical Council) where he is attested only at the seventh session on 13 October 787; in the list of those present at the session he is styled Κωνσταντίνου ἐπισκόπου Μέτρων: Mansi XIII 373 (the Latin version, at XIII 374, styles him: "Constantino episcopo Metrorum"). At the seventh session he subscribed the statement of the faith adopted by the Council and is styled Κώνστας (sic) ἀνάξιος ἐπίσκοπος Μέτρων: Mansi XIII 388 (the Latin version, at XIII 387, reads "Constans indignus episcopus Metrorum"). Metra probably means Metropolis, but it is uncertain whether the one in Asia is intended or the one in Pisidia.

(Publishable link for this person: )