The Jewish community of Rome dates back to the second century BCE. Its history is known from several Latin and Greek sources, the Talmud, and inscriptions found in the catacombs. “Rabbinical” Judaism, whose core thoughts are collected in the Babylonian Talmud, originated towards the end of the first century CE, after the Temple of Jerusalem was destroyed. Its center was the academy of Yavneh, which in theory was also in charge of the Jews in the Diaspora. We know from the Talmud that at the beginning of the 2nd century CE, a certain Rabbi Matthias was sent from Yavneh to Rome. However, the Romans did not always accept his authority: the Talmud reports that the leader of the Roman community, Theudas, refused Yavneh’s instructions to modify the way the Passover lamb was butchered. We gather from these passages that in Judaea the ritual must have been changed after the destruction of the Temple. In most communities around the world, the custom of eating lamb at the seder was eventually abolished “until the Temple will be restored”. However, because of Theudas’s refusal to follow the dictates from Yavneh, the Roman community continued to prepare the Passover lamb as always (until even Yavneh gave in and accepted the difference). To this day, Roman Jews (who are very proud to be neither Ashkenazic nor Sephardic) serve lamb at their Seder.