Sephardic Jews in the Netherlands of Sephardic Jewry in Amsterdam, the Mahamad also closely controlled the process of re-judaization - that is helping those whose families had been secretly living as Jews while being outwardly Catholic return to a full Jewish life. In this process, several individuals rejected Rabbinic Judaism or advanced ideas outside of the norms of Judaism at that time and were disciplined by the Mahamad through the process of herem, which could be anything from denial of Torah honors to an outright ban on the individual. The most famous of those to receive a full ban herem was philosopher Baruch Spinoza, whose
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