Sephardic law and customs Spain or Portugal (as well as one Romaniot and one Ashkenazi synagogue). In a process lasting from the 16th through the 19th century, the native Jewish communities of most Arab and Ottoman countries adapted their pre-existing liturgies, many of which already had a family resemblance with the Sephardic, to follow the Spanish rite in as many respects as possible. Some reasons for this are: The most important theological, as opposed to practical, motive for harmonization was the Kabbalistic teachings of Isaac Luria and Ḥayim Vital. Luria himself always maintained that it was the duty of every Jew to abide by
Sephardic law and customs Lurianic-Sephardic rite extended even to countries outside the Ottoman sphere of influence such as Iran, where there were no Spanish exiles. (The previous Iranian rite was based on the Siddur of Saadia Gaon.) The main exceptions to this tendency were: There were also Kabbalistic groups in the Ashkenazic world, which adopted the Lurianic-Sephardic ritual, on the theory of the thirteenth gate mentioned above. This accounts for the "Nusach Sefard" and "Nusach Ari" in use among the Hasidim, which is based on the Lurianic-Sephardic text with some Ashkenazi variations. From the 1840s on a series of prayer-books was published in Livorno,