This article records tradition as it has been passed down and reported. Its sources are not yet part of the atlas's verified catalogue.
Ottoman authorities arrested Sabbatai Zevi in 1666, the same year his followers had anticipated as bringing national deliverance and a return to the land of Israel. Rather than face execution for the claims that had already mobilized Jewish communities across three continents, Zevi converted to Islam that September under direct pressure from the sultan, exchanging the messianic role his followers had proclaimed for him for survival under Ottoman authority.
The conversion shattered the movement's mainstream following almost as quickly as Nathan of Gaza's proclamation had built it. Communities that had disrupted their ordinary religious and economic life in expectation of 1666 were left instead with a messiah who had converted to the religion of the empire that ruled him, a reversal that most of his followers could not reconcile with the deliverance they had been promised.
A minority of believers did not abandon him, however, and followed Zevi into outward conversion themselves, forming a crypto Jewish community that continued practicing Jewish tradition in secret behind an outward profession of Islam. Known as the Donmeh, that community persisted for centuries afterward in Ottoman lands, the one part of Sabbatai Zevi's mass movement that survived the very event, his own conversion, that had ended the movement everywhere else.