the individual scholars who brought it to its present form cannot be fixed with assurance. By this time Christianity had become the state religion of the Roman Empire and Jerusalem the holy city of Christendom. In 325 Constantine the Great, the first Christian emperor, said "let us then have nothing in common with the detestable Jewish crowd." This policy made a Jew an outcast and pauper. The compilers of the Jerusalem Talmud consequently lacked the time to produce a work of the quality they had intended. The text is evidently incomplete and is not easy to follow. The apparent cessation of work on the Jerusalem Talmud in the 5th century has been associated with the decision of Theodosius II in 425 to suppress the Patriarchate and put an end to the practice of semikhah, formal scholarly ordination. Some modern scholars have questioned this connection. Despite its incomplete state, the Jerusalem Talmud remains an indispensable source of knowledge of the development of the Jewish Law in the Holy Land. It was also an important primary source for the study of the Babylonian Talmud by the Kairouan school of Chananel ben Chushiel and Nissim ben Jacob, with the result that opinions ultimately based on the Jerusalem Talmud found their way into both the Tosafot and the Mishneh Torah of Maimonides. Ethical maxims contained in the Jerusalem Talmud are scattered and interspersed in the legal discussions throughout the several treatises, many of which differing from those in the Babylonian Talmud. Following the formation of the modern state of Israel there is some interest in restoring Eretz Yisrael traditions. For example, rabbi David Bar-Hayim of the Makhon Shilo institute has issued a siddur reflecting Eretz Yisrael practice as found in the Jerusalem Talmud and other sources. Babylonian Talmud The Babylonian Talmud (Talmud Bavli) consists of documents compiled over the period of late antiquity (3rd to 6th centuries). During this time, the most important of the Jewish centres in Mesopotamia, a region called "Babylonia" in Jewish sources and later known as Iraq, were Nehardea, Nisibis (modern Nusaybin), Mahoza (al-Mada'in, just to the south of what is now Baghdad), Pumbedita (near present-day al Anbar Governorate), and the Sura Academy, probably located about south of Baghdad. The Babylonian Talmud comprises the Mishnah and the Babylonian Gemara, the latter representing the culmination of more than 300 years of analysis of the Mishnah in the Talmudic Academies in Babylonia.