A monk, Ioseph 16 was presbyteros and oikonomos of the Great Church (Hagia Sophia); owner of a seal dateable to the late eighth or the ninth century: Zacos and Veglery 1337 = Laurent, Corpus V 3, no. 1638. The name and titles read: Ἰωσὴφ μοναχῷ, πρεσβυτέρῳ καὶ οἰκονόμῳ τῆς Μεγάλης Ἐκκλησίας. Laurent proposed a date in the second half of the ninth century, and suggested identifying the owner with the hymnographer Ioseph (Ioseph 12); Ioseph 12 is not known to have been oikonomos of Hagia Sophia. Zacos and Veglery propose a date in the late eighth or early ninth century, during the interval between the First and the Second Iconoclast periods; if so, the owner could be identical with the oikonomos Ioseph 2 who was involved in the Moechian Controversy; Ioseph 2 was not just a monk but was also hegoumenos of the monastery of Ta Kathara, but the identification is nevertheless possible.

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