Most notable in the rabbinic period on the issue of polygamy, though more specifically for Ashkenazi Jews, was the synod of Rabbeinu Gershom. About 1000 CE he called a synod which decided the following particulars: (1) prohibition of polygamy; (2) necessity of obtaining the consent of both parties to a divorce; (3) modification of the rules concerning those who became apostates under compulsion; (4) prohibition against opening correspondence addressed to another. Some Sephardic Jews such as Abraham David Taroç, were known to have several wives.