Sources: Talmud Bavli Sanhedrin 93b; Yerushalmi Taanit 4:5; Eusebius, Ecclesiastical History 4.6; Cassius Dio 69.12–14; Bar Kokhba letters (Dead Sea caves, discovered 1960s).

The Bar Kokhba revolt (132–135 AD) is the last major Jewish military uprising against Rome and the final catastrophe that ends the ancient Jewish state until 1948. Its causes: Hadrian’s plan to rebuild Jerusalem as a pagan city (Aelia Capitolina) with a temple to Jupiter on the Temple Mount, and possibly a ban on circumcision. Shimon bar Kosiba led the revolt; Rabbi Akiva — the greatest Talmudic sage of his generation — declared him the Messiah and gave him the name Bar Kokhba (Son of the Star, from Numbers 24:17). This is the most significant rabbinic messianic declaration before Sabbatai Zevi. The revolt initially succeeded: bar Kosiba controlled significant territory and minted coins dated “Year 1 of the Redemption of Israel.” The Roman reconquest under Julius Severus was systematic and brutal: Cassius Dio reports 580,000 Jewish dead, 50 fortified towns and 985 villages destroyed. After the revolt: Hadrian renamed Judea “Syria Palaestina” (to erase the Jewish name), banned Jews from Jerusalem, plowed the city and salted it. Rabbi Akiva was executed by the Romans — flayed alive. The revolt’s failure permanently ended Jewish political independence in the land and established the diaspora as Judaism’s permanent condition. Bar Kosiba was posthumously renamed Bar Koziba (Son of a Lie) by the rabbis who had opposed the revolt.