Roubim 1 was bishop of Skopelos (an island off Thessalia; cf. Nesbitt and Oikonomides, DO Seals II, p. 148); in 787 he attended the Second Council of Nikaia (the Seventh Ecumenical Council) and was probably present at the last seven sessions, from 26 September to 23 November 787 (he is not attested at the first session): Mansi XII 1110-XIII 486. In the list of those present at the seventh session he is styled Ροῦβιμ ἐπισκόπου τοῦ Σκοπέλου: Mansi XIII 372 (the Latin version reads: "Ruben episcopo Scopeli"). Elsewhere he is styled Ροῦβιμ ὁ ὁσιώτατος ἐπίσκοπος Σκοπέλεως or similar: Mansi XII 1110, XIII 149 (τοῦ Σκοπέλου), XIII 397 (ἀνάξιος ἐπίσκοπος Σκοπέλου). The Latin versions give his name as Ruben or similar. At the second session he supported the traditional veneration of icons as described in statements from pope Hadrian I (Hadrianos 1) and condemned iconoclasts: Mansi XII 1110. At the fourth session he subscribed the statements read out from the Fathers in support of the veneration of icons: Mansi XIII 149. At the seventh session he subscribed the statement of the faith adopted by the Council: Mansi XIII 397.

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