Martyrdom
The fuller traditional account relates that Stamatius came to Constantinople in or around 1680 as part of a delegation of his countrymen seeking relief from an oppressive tax collected for the Ottoman court. After the delegation was expelled and beaten, Turkish officials detained Stamatius and brought him before the Vizier, slandering him with the claim that he had earlier accepted Islam and was now openly living as a Christian — in Ottoman law an apostasy from Islam punishable by death.
Stamatius rejected the accusation and steadfastly confessed his Christian faith. The synaxarion relates that he endured torture and repeated questioning without yielding, and that the Vizier finally ordered his execution. He was beheaded, by tradition near Hagia Sophia, on August 15, 1680.
Commemoration
Because his martyrdom fell on August 15, the great feast of the Dormition of the Theotokos, the Church keeps his memory on the following day, August 16. By tradition the Metropolitan of Demetrias permitted the feast to be observed locally on the first Sunday after August 15.
His life was recorded by his contemporary John Kariophyllis; Saint Nikodemos the Hagiorite later included him in the New Martyrologion, drawing on Kariophyllis's account; and in 1860 the Athonite monk Iakovos Kophos of New Skete composed a liturgical Service in his honor.
Relics & Shrines
Veneration of Saint Stamatius is recorded as especially strong on the island of Chios. The Chapel of Saint Stamatius near the Church of the Annunciation at Vrontados was consecrated on August 16, 1992, built by the shipowner Stamatios Fafalios; the Parish Church of Saint John the Theologian in Chios town dedicates its left section to his memory; and the Chapel of Saint George and Saint Stamatius at Ververato draws large congregations on his feast. He is also honored at Gymno on the island of Evia in the Parish Church of the Dormition.
The oldest known icon of the saint, dating to 1860 and held by a family on Chios, depicts him together with the Holy Mandylion (the Icon Not Made by Hands).