Konstantinos 141 was the son of the emperor Basil I (Basilios 7); he was crowned by his father with his two brothers, Leo 25 and Alexandros 10, and was supposed to succeed his father, but died first; brother also of Stephanos (II PBE): Genesius IV 29. Eldest son of Basilios 7; he died suddenly soon after Photios 1 regained the patriarchate in 877: Nicetas, Vita Ignatii 573A-B (Κωνσταντῖνος ὁ τριπόθητος καὶ πρωτότοκος υἱὸς). He was the son of Basilios 7 and Eudokia Ingerina (Eudokia 2) and the brother of Leo 25, Alexandros 10 and Stephanos (II PBE): Nicetas, Vita Ignatii 565D (Βασιλείου τοῦ βασιλέως, Εὐδοκίας τε τῆς αὐτοῦ γαμετῆς, καὶ τῶν παίδων Κωνσταντίνου, Λέοντος, Ἀλεξάνδρου, καὶ Στεφάνου). He was canonised by Photios 1, allegedly to please the emperor Basilios 7: Nicetas, Vita Ignatii 573B. He died on 3 September 879: cf. Theoph. Cont. 345 and see PBE} II. See further Theoph. Cont. 256, 264, 278, 281, 348. See ODB I, p. 498 (his mother was Maria 5) and F. Halkin, "Trois dates historiques précisées grâce au Synaxaire", Byz. 24 (1954), pp. 14-17.

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