restrictions in the professions Jews could practice analogous to those common in Western Christian countries. There were restrictions in the areas Jews could live or work, but such restrictions were imposed on Ottoman subjects of other religions as well. Like all non-Muslims, Jews had to pay the haraç "head tax" and faced other restrictions in clothing, horse riding, army service etc., but they could occasionally be waived or circumvented. Jews who reached high positions in the Ottoman court and administration include Mehmed the Conqueror's Minister of Finance (Defterdar) Hekim Yakup Paşa, his Portuguese physician Moses Hamon, Murad II's physician İshak Paşa and Abraham de Castro, master of the mint in Egypt. During the Classical Ottoman period (1300–1600), the Jews, together with most other communities of the empire, enjoyed a certain level of prosperity. Compared with other Ottoman subjects, they were the predominant power in commerce and trade as well in diplomacy and other high offices. In the 16th century especially, the Jews were the most prominent under the millets, the apogee of Jewish influence could arguably be the appointment of Joseph Nasi to sanjak-bey (governor, a rank usually only bestowed upon Muslims) of Naxos. Also in the first half of the 17th century the Jews were distinct in winning tax farms, Haim Gerber describes it: "My impression is that no pressure existed, that it was merely performance that counted." Friction between Jews and Turks was less common than in the Arab territories. Some examples: During the reign of Murad IV (1623–40), the Jews of Jerusalem were persecuted by an Arab who had purchased the governorship of that city from the governor of the province. Under Mehmed IV (1649–87), the 1660 destruction of Safed occurred. An additional problem was Jewish ethnic divisions. They had come to the Ottoman Empire from many lands, bringing with them their own customs and opinions, to which they clung tenaciously, and had founded separate congregations. Another tremendous upheaval was caused when Sabbatai Zevi proclaimed to be the Messiah. He was eventually caught by the Ottoman authorities and when given the choice between death and conversion, he opted for the latter. His remaining disciples converted to Islam too. Their descendants are today known as Dönmeh. The history of the Jews in Turkey in the 18th and 19th century is principally a chronicle of decline in influence and power; they lost their influential positions in trade mainly to