Mentioned in the painted ktitorial inscription running on the cornice of the northern and southern walls of the central aisle of the Church of Saint Nicholas in Manastir in the region of Mariovo and in the inscription on the reverse side of the icon of Saint George from the Church of Saint George in Struga. He was the deacon and refendarios of the Archbishopric of Ōhrid. He sponsored the restoration of the icon of the Saint George, which was kept in the church of Saint George in Struga (δῶρον τοῦ σοῦ οἰκέτου καὶ εὐτελοῦς Ἰωάννου τοῦ διακόνου ῥαιφερενδαρΐου τε ἀξΐαν ἔχων· γράψαντϊ σεπτῶς τὴν σὴν μορφὴν ἁγίαν ἐν χρωματουργήμασϊ ποικϊλοτρόποις ταύτην ἀνιστῶν ἐν Στρούγαις τῆς Ἀχρίδος. Ἰωάννης ἐκ πόθου τὴν δέησϊν ποιεῖται· ἐν ἔτει ςψοε ἰνδικτιῶνος θ ἀνϊστορΐθη διὰ χειρὸς Ἰωάννου ἱστοριογράφου ἐκ Νεαπόλεως). He supervised the fresco decoration of the Church of Saint Nicholas in Manastir, which was finished in 1270/1271 (Ὁ ναὸς γὰρ ἦν σμικρώτατος, σαθρὸς, ῥακοθεὶς δὲ καὶ διατετρωμένος ἀρραγῆς καὶ μὶ φέρων ὁρᾶν τὴν τοῦ ναοῦ σβέσιν ὁ πανοσιώτατος καθηγούμενος τῆς μονῆς ὁ κυρὸς Ἰωαννίκιος, ὁ καὶ διὰ τοῦ ἁγίου σχίματος ἐπωνομασθεὶς Ἀκάκιος καὶ χωρέσας ὑπὲρ χρημάτων ἀναχωρεῖ τοῦτον θεῖαν εὐσεβῆς ἐπιχωρῖν καὶ ἐν ὑπηρεσία ἄγειν ὁ καὶ προκαλέσας τοὺς ἐν Χριστῶ ἀδελφοὺς αὐτοῦ...ἅμα καὶ εὐθὺς χαλάσας τὴν ἐκκλησίαν ἀνήγυρεν ἐκ βάθρων τὸν πάνσεπτον ναὸν τοῦτον καὶ οραΐσας καὶ καλεῖ ἐν αὐτοῖς τὸν ἐν χρωματουργίμασιν πικυλοτρόποις καὶ ἐν βαθεῖ γνόμονας χεῖρας ταπινότατος Ἰωάννης διάκονος καὶ ἐπὶ τῶν κρίσεων τῆς ἁγιωτάτης ἀρχιεπισκοπῆς, καὶ...ἐν ἔτει ἐξακισχιλιστὸ καὶ ἑπτακοσιοστό τε ο δ, ἰνδικτιῶνος θ, ἀνιστορίθι δὲ ἐν ἕτι ς ψ ο θ, ἰνδικτιῶνος ιδ, ἐπὶ τῆς βασιλείας τοῦ εὐσεβεστάτου μεγάλου βασλέως καὶ αὐτοκράτωρος Ῥωμαίων Δοῦκα Ἀγγέλου Κομνηνοῦ Μιχαήλ τοῦ Παλαιολόγου καὶ Νέου Κωνσταντίνου).