Tavernier describes the Georgians as being very ignorant in matters of religion and the clergy as unlettered and vicious; some of the heads of the Church actually sold the Christian boys and girls as slaves to the Turks and Persians. [258] From this period there seems to have been a widespread apostasy, especially among the higher classes and those who sought to win the favour of the Persian court. [259] In 1701 the occupant of the throne of Georgia, Wakhtang VI, was a Christian: for the first seven years of his reign he was a prisoner in Ispahan, where great efforts were made to induce him to become a Muhammadan; when he declared that he preferred to lose his throne rather than purchase it at the price of apostasy, it is said that his younger brother, although he was the Patriarch of Georgia, offered to abandon Christianity and embrace Islam, if the crown were bestowed upon him, but though invested by the Persians with the royal power, the Georgians refused to accept him as their ruler, and drove him out of the kingdom. [260] Towards the close of the eighteenth century, the king of Georgia placed his people under the protection of the Russian crown. Hitherto their intense patriotic feeling had helped to keep the Christian faith alive among them so long as their foreign invaders had been Musalmans, but now that the foreign power that sought to rob them of their independence was Christian, this same feeling operated in some of the districts north of the Caucasus to the advantage of Islam. In Daghistan a certain Darvīsh Manṣūr endeavoured to unite the different tribes of the Caucasus to oppose the Russians; preaching the faith of Islam he succeeded in converting the princes and nobles of Ubichistan and Daghistan, who have remained faithful to Islam ever since; many of the Circassians, too, were converted by his preaching, and preferred exile to submitting to the Russian rule. [261] But in 1791 he was taken prisoner, and in 1800 Georgia was formally incorporated in the Russian empire.