Ioannes 129 | Prosopography of the Byzantine Empire |
| Sex | M |
| Floruit | L VIII |
| Dates | 787 (taq) / 787 (tpq) |
| PmbZ No. | 3092 |
| Religion | Christian; Iconophile |
| Locations | Koilades (Monastery of the) (officeplace); Koilades (Monastery of the) (residence); Koilades (Monastery of the); Nikaia |
| Occupation | Hegoumenos |
| Titles | Hegoumenos, Koilades (office) |
| Textual Sources | Nikaia, Second Council of (Seventh Ecumenical Council, a. 787) (Mansi XII-XIII) (conciliar) |
Ioannes 129 was hegoumenos of the monastery of the Koilades; in 787 he attended the Second Council of Nikaia (the Seventh Ecumenical Council) and is attested at the fourth session, on 1 October 787, when he subscribed the statements read out from the Fathers in support of the veneration of icons: Mansi XIII 153 (Ἰωάννης ἡγούμενος τῶν Κοιλάδων; the Latin version, at XIII 154, calls him "
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