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 process of standardization: in a list of differences preserved from the time of the Geonim, most of the usages recorded as Palestinian are now obsolete. (In the list of usages below, Sephardic usages inherited from Palestine are marked P, and instances where the Sephardic usage conforms to the Babylonian while the Ashkenazic usage is Palestinian are marked B.) By the 12th century, as a result of the efforts of Babylonian leaders such as Yehudai Gaon and Pirqoi ben Baboi, the communities of Palestine, and Diaspora communities such as Kairouan which had historically followed Palestinian usages, had adopted Babylonian rulings in