In the year 47 B.C.E., Julius Caesar wrote a letter to the people of Sidon, a Greek city in what is today Lebanon. Sidon had recently fallen under the governance of Rome. Caesar’s letter, preserved by the Greco-Jewish historian Josephus (Antiquities 14.190-195), expresses the newly appointed dictator’s desire that the Sidonians recognize the jurisdiction of Hyrcanus II, the king and high priest of the Jews, over the internal affairs of his people. Caesar’s missive, apparently sent in response to an unknown crisis of authority in the territory between Sidon and Jerusalem, is often cited as the earliest surviving charter for the toleration of the Jewish religion in the storied history of ancient Rome. That grandiose assessment stretches its wording rather thin, but the letter certainly does speak to a legal condition that would sustain the Jewish people through their own trying history under Roman rule. For, in spite of their differences from the vast majority of Rome’s subjects, the Jews were allowed to practice their religion freely in the Roman world. Although this right would face challenges under the Empire, it would not be seriously compromised until Rome was to begin its transformation into a Christian state. In the meantime, the enduring viability of the Jews and their national cult would pose a crucial dilemma for proponents of the early Church who wished to assert that their own unconventional religious rites should not be mistaken for the rites of Jews. The conflict of interests between Christian and Jew is recounted in the New Testament book of Acts. Carrying the main thread of the book’s story is the apostle Paul, who undertakes to spread the word of Jesus to the gentiles. Yet Paul seems to know that his success depends on his ability to achieve notoriety among his fellow Jews. An exemplary account of his modus operandi appears in Acts 13. Arriving in Antioch-in-Pisidia, Paul and his companions attend the local synagogue on the Sabbath. There, he addresses the Jewish assembly with a version of the gospel emphasizing its message of salvation for all peoples. The following week, Paul attracts “almost the entire city” (Acts 13.44) to the synagogue to hear his news. This popularity alarms the Jews, who now challenge Paul and promptly chase the apostolic contingent out of the city. Paul, however, is emboldened by this turn of events and proclaims that the Jews had to reject the gospel in order to justify his mission to the gentiles (Acts 13.46). How accurately does this story reflects Paul’s experience in Antioch-in-Pisidia? It is difficult to say. But its depiction of the city’s Jewish community is realistic in at least one respect. When Paul delivers his speech to Jews, he is received well. But when he delivers the same speech to a gentile audience, the Jews are alarmed. Operating comfortably within the Roman public sphere, the Jews are, nonetheless, protective of their tenuous position with respect to the legality of their cult. Paul’s talk of Jesus as the king and savior of Israel may have seemed innocuous at first. Yet spoken to gentiles, it could have been heard as a challenge to Rome’s existing political order. The Jews, therefore, have good reason to resist Paul’s overture. They don’t want to compromise the welfare of their community by appearing to their Roman overseers to support his sedition. The fact that Jews were permitted to practice their religion remained a sore point for Christians as long as they were restricted from practicing theirs. Some would go on to begrudge the Jews their freedom while others would cite its precedent as grounds for their own claims of legitimacy. Regrettably, both of those responses would prove to trouble the Jews of Rome when Christianity began its rise to prominence in the early fourth century. By that time, the legal disparity between Christian and Jew had long since contributed to the separation of their respective communities. One must imagine that Julius Caesar would have been astonished to know how profoundly his casual recognition of a peripheral foreign cult would impact the course of western history following its assimilation to the Christian narrative.